diff --git a/package.json b/package.json
index 3cde275..66679c0 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   },
   "devDependencies": {
     "@babel/cli": "7.2.0",
-    "@babel/core": "7.2.0",
+    "@babel/core": "7.8.7",
     "prettier": "1.18.2",
     "nyc": "13.1.0",
     "jest": "23.2.0"
diff --git a/yarn.lock b/yarn.lock
index 9bef8fc..8c5365c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -26,27 +26,35 @@
   dependencies:
     "@babel/highlight" "^7.0.0"
 
-"@babel/core@7.2.0":
-  version "7.2.0"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.2.0.tgz#a4dd3814901998e93340f0086e9867fefa163ada"
-  integrity sha512-7pvAdC4B+iKjFFp9Ztj0QgBndJ++qaMeonT185wAqUnhipw8idm9Rv1UMyBuKtYjfl6ORNkgEgcsYLfHX/GpLw==
-  dependencies:
-    "@babel/code-frame" "^7.0.0"
-    "@babel/generator" "^7.2.0"
-    "@babel/helpers" "^7.2.0"
-    "@babel/parser" "^7.2.0"
-    "@babel/template" "^7.1.2"
-    "@babel/traverse" "^7.1.6"
-    "@babel/types" "^7.2.0"
-    convert-source-map "^1.1.0"
+"@babel/code-frame@^7.8.3":
+  version "7.8.3"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.8.3.tgz#33e25903d7481181534e12ec0a25f16b6fcf419e"
+  integrity sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==
+  dependencies:
+    "@babel/highlight" "^7.8.3"
+
+"@babel/core@7.8.7":
+  version "7.8.7"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.8.7.tgz#b69017d221ccdeb203145ae9da269d72cf102f3b"
+  integrity sha512-rBlqF3Yko9cynC5CCFy6+K/w2N+Sq/ff2BPy+Krp7rHlABIr5epbA7OxVeKoMHB39LZOp1UY5SuLjy6uWi35yA==
+  dependencies:
+    "@babel/code-frame" "^7.8.3"
+    "@babel/generator" "^7.8.7"
+    "@babel/helpers" "^7.8.4"
+    "@babel/parser" "^7.8.7"
+    "@babel/template" "^7.8.6"
+    "@babel/traverse" "^7.8.6"
+    "@babel/types" "^7.8.7"
+    convert-source-map "^1.7.0"
     debug "^4.1.0"
+    gensync "^1.0.0-beta.1"
     json5 "^2.1.0"
-    lodash "^4.17.10"
+    lodash "^4.17.13"
     resolve "^1.3.2"
     semver "^5.4.1"
     source-map "^0.5.0"
 
-"@babel/generator@^7.0.0", "@babel/generator@^7.2.0", "@babel/generator@^7.2.2":
+"@babel/generator@^7.0.0", "@babel/generator@^7.2.2":
   version "7.3.2"
   resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.3.2.tgz#fff31a7b2f2f3dad23ef8e01be45b0d5c2fc0132"
   integrity sha512-f3QCuPppXxtZOEm5GWPra/uYUjmNQlu9pbAD8D/9jze4pTY83rTtB1igTBSwvkeNlC5gR24zFFkz+2WHLFQhqQ==
@@ -57,6 +65,16 @@
     source-map "^0.5.0"
     trim-right "^1.0.1"
 
+"@babel/generator@^7.8.6", "@babel/generator@^7.8.7":
+  version "7.8.7"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.8.7.tgz#870b3cf7984f5297998152af625c4f3e341400f7"
+  integrity sha512-DQwjiKJqH4C3qGiyQCAExJHoZssn49JTMJgZ8SANGgVFdkupcUhLOdkAeoC6kmHZCPfoDG5M0b6cFlSN5wW7Ew==
+  dependencies:
+    "@babel/types" "^7.8.7"
+    jsesc "^2.5.1"
+    lodash "^4.17.13"
+    source-map "^0.5.0"
+
 "@babel/helper-function-name@^7.1.0":
   version "7.1.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.1.0.tgz#a0ceb01685f73355d4360c1247f582bfafc8ff53"
@@ -66,6 +84,15 @@
     "@babel/template" "^7.1.0"
     "@babel/types" "^7.0.0"
 
+"@babel/helper-function-name@^7.8.3":
+  version "7.8.3"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.8.3.tgz#eeeb665a01b1f11068e9fb86ad56a1cb1a824cca"
+  integrity sha512-BCxgX1BC2hD/oBlIFUgOCQDOPV8nSINxCwM3o93xP4P9Fq6aV5sgv2cOOITDMtCfQ+3PvHp3l689XZvAM9QyOA==
+  dependencies:
+    "@babel/helper-get-function-arity" "^7.8.3"
+    "@babel/template" "^7.8.3"
+    "@babel/types" "^7.8.3"
+
 "@babel/helper-get-function-arity@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0.tgz#83572d4320e2a4657263734113c42868b64e49c3"
@@ -73,6 +100,13 @@
   dependencies:
     "@babel/types" "^7.0.0"
 
+"@babel/helper-get-function-arity@^7.8.3":
+  version "7.8.3"
+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.8.3.tgz#b894b947bd004381ce63ea1db9f08547e920abd5"
+  integrity sha512-FVDR+Gd9iLjUMY1fzE2SR0IuaJToR4RkCDARVfsBBPSP53GEqSFjD8gNyxg246VUyc/ALRxFaAK8rVG7UT7xRA==
+  dependencies:
+    "@babel/types" "^7.8.3"
+
 "@babel/helper-split-export-declaration@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.0.0.tgz#3aae285c0311c2ab095d997b8c9a94cad547d813"
@@ -80,14 +114,21 @@
   dependencies:
     "@babel/types" "^7.0.0"
 
-"@babel/helpers@^7.2.0":
-  version "7.3.1"
-  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.3.1.tgz#949eec9ea4b45d3210feb7dc1c22db664c9e44b9"
-  integrity sha512-Q82R3jKsVpUV99mgX50gOPCWwco9Ec5Iln/8Vyu4osNIOQgSrd9RFrQeUvmvddFNoLwMyOUWU+5ckioEKpDoGA==
+"@babel/helper-split-export-declaration@^7.8.3":
+  version "7.8.3"
+  resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.8.3.tgz#31a9f30070f91368a7182cf05f831781065fc7a9"
+  integrity sha512-3x3yOeyBhW851hroze7ElzdkeRXQYQbFIb7gLK1WQYsw2GWDay5gAJNw1sWJ0VFP6z5J1whqeXH/WCdCjZv6dA==
   dependencies:
-    "@babel/template" "^7.1.2"
-    "@babel/traverse" "^7.1.5"
-    "@babel/types" "^7.3.0"
+    "@babel/types" "^7.8.3"
+
+"@babel/helpers@^7.8.4":
+  version "7.8.4"
+  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.8.4.tgz#754eb3ee727c165e0a240d6c207de7c455f36f73"
+  integrity sha512-VPbe7wcQ4chu4TDQjimHv/5tj73qz88o12EPkO2ValS2QiQS/1F2SsjyIGNnAD0vF/nZS6Cf9i+vW6HIlnaR8w==
+  dependencies:
+    "@babel/template" "^7.8.3"
+    "@babel/traverse" "^7.8.4"
+    "@babel/types" "^7.8.3"
 
 "@babel/highlight@^7.0.0":
   version "7.0.0"
@@ -98,12 +139,26 @@
     esutils "^2.0.2"
     js-tokens "^4.0.0"
 
-"@babel/parser@^7.0.0", "@babel/parser@^7.2.0", "@babel/parser@^7.2.2", "@babel/parser@^7.2.3":
+"@babel/highlight@^7.8.3":
+  version "7.8.3"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.8.3.tgz#28f173d04223eaaa59bc1d439a3836e6d1265797"
+  integrity sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==
+  dependencies:
+    chalk "^2.0.0"
+    esutils "^2.0.2"
+    js-tokens "^4.0.0"
+
+"@babel/parser@^7.0.0", "@babel/parser@^7.2.2", "@babel/parser@^7.2.3":
   version "7.3.2"
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.3.2.tgz#95cdeddfc3992a6ca2a1315191c1679ca32c55cd"
   integrity sha512-QzNUC2RO1gadg+fs21fi0Uu0OuGNzRKEmgCxoLNzbCdoprLwjfmZwzUrpUNfJPaVRwBpDY47A17yYEGWyRelnQ==
 
-"@babel/template@^7.0.0", "@babel/template@^7.1.0", "@babel/template@^7.1.2":
+"@babel/parser@^7.8.6", "@babel/parser@^7.8.7":
+  version "7.8.7"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.8.7.tgz#7b8facf95d25fef9534aad51c4ffecde1a61e26a"
+  integrity sha512-9JWls8WilDXFGxs0phaXAZgpxTZhSk/yOYH2hTHC0X1yC7Z78IJfvR1vJ+rmJKq3I35td2XzXzN6ZLYlna+r/A==
+
+"@babel/template@^7.0.0", "@babel/template@^7.1.0":
   version "7.2.2"
   resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.2.2.tgz#005b3fdf0ed96e88041330379e0da9a708eb2907"
   integrity sha512-zRL0IMM02AUDwghf5LMSSDEz7sBCO2YnNmpg3uWTZj/v1rcG2BmQUvaGU8GhU8BvfMh1k2KIAYZ7Ji9KXPUg7g==
@@ -112,7 +167,16 @@
     "@babel/parser" "^7.2.2"
     "@babel/types" "^7.2.2"
 
-"@babel/traverse@^7.0.0", "@babel/traverse@^7.1.5", "@babel/traverse@^7.1.6":
+"@babel/template@^7.8.3", "@babel/template@^7.8.6":
+  version "7.8.6"
+  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.8.6.tgz#86b22af15f828dfb086474f964dcc3e39c43ce2b"
+  integrity sha512-zbMsPMy/v0PWFZEhQJ66bqjhH+z0JgMoBWuikXybgG3Gkd/3t5oQ1Rw2WQhnSrsOmsKXnZOx15tkC4qON/+JPg==
+  dependencies:
+    "@babel/code-frame" "^7.8.3"
+    "@babel/parser" "^7.8.6"
+    "@babel/types" "^7.8.6"
+
+"@babel/traverse@^7.0.0":
   version "7.2.3"
   resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.2.3.tgz#7ff50cefa9c7c0bd2d81231fdac122f3957748d8"
   integrity sha512-Z31oUD/fJvEWVR0lNZtfgvVt512ForCTNKYcJBGbPb1QZfve4WGH8Wsy7+Mev33/45fhP/hwQtvgusNdcCMgSw==
@@ -127,7 +191,22 @@
     globals "^11.1.0"
     lodash "^4.17.10"
 
-"@babel/types@^7.0.0", "@babel/types@^7.2.0", "@babel/types@^7.2.2", "@babel/types@^7.3.0", "@babel/types@^7.3.2":
+"@babel/traverse@^7.8.4", "@babel/traverse@^7.8.6":
+  version "7.8.6"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.8.6.tgz#acfe0c64e1cd991b3e32eae813a6eb564954b5ff"
+  integrity sha512-2B8l0db/DPi8iinITKuo7cbPznLCEk0kCxDoB9/N6gGNg/gxOXiR/IcymAFPiBwk5w6TtQ27w4wpElgp9btR9A==
+  dependencies:
+    "@babel/code-frame" "^7.8.3"
+    "@babel/generator" "^7.8.6"
+    "@babel/helper-function-name" "^7.8.3"
+    "@babel/helper-split-export-declaration" "^7.8.3"
+    "@babel/parser" "^7.8.6"
+    "@babel/types" "^7.8.6"
+    debug "^4.1.0"
+    globals "^11.1.0"
+    lodash "^4.17.13"
+
+"@babel/types@^7.0.0", "@babel/types@^7.2.2", "@babel/types@^7.3.2":
   version "7.3.2"
   resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.3.2.tgz#424f5be4be633fff33fb83ab8d67e4a8290f5a2f"
   integrity sha512-3Y6H8xlUlpbGR+XvawiH0UXehqydTmNmEpozWcXymqwcrwYAl5KMvKtQ+TF6f6E08V6Jur7v/ykdDSF+WDEIXQ==
@@ -136,6 +215,15 @@
     lodash "^4.17.10"
     to-fast-properties "^2.0.0"
 
+"@babel/types@^7.8.3", "@babel/types@^7.8.6", "@babel/types@^7.8.7":
+  version "7.8.7"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.8.7.tgz#1fc9729e1acbb2337d5b6977a63979b4819f5d1d"
+  integrity sha512-k2TreEHxFA4CjGkL+GYjRyx35W0Mr7DP5+9q6WMkyKXB+904bYmG40syjMFV0oLlhhFCwWl0vA0DyzTDkwAiJw==
+  dependencies:
+    esutils "^2.0.2"
+    lodash "^4.17.13"
+    to-fast-properties "^2.0.0"
+
 abab@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/abab/-/abab-2.0.0.tgz#aba0ab4c5eee2d4c79d3487d85450fb2376ebb0f"
@@ -840,6 +928,13 @@ convert-source-map@^1.1.0, convert-source-map@^1.4.0, convert-source-map@^1.5.1,
   dependencies:
     safe-buffer "~5.1.1"
 
+convert-source-map@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.7.0.tgz#17a2cb882d7f77d3490585e2ce6c524424a3a442"
+  integrity sha512-4FJkXzKXEDB1snCFZlLP4gpC3JILicCpGbzG9f9G7tGqGCzETQ2hWPrcinA9oU4wtf2biUaEH5065UnMeR33oA==
+  dependencies:
+    safe-buffer "~5.1.1"
+
 cookie-signature@1.0.6:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.0.6.tgz#e303a882b342cc3ee8ca513a79999734dab3ae2c"
@@ -1522,6 +1617,11 @@ gauge@~2.7.3:
     strip-ansi "^3.0.1"
     wide-align "^1.1.0"
 
+gensync@^1.0.0-beta.1:
+  version "1.0.0-beta.1"
+  resolved "https://registry.yarnpkg.com/gensync/-/gensync-1.0.0-beta.1.tgz#58f4361ff987e5ff6e1e7a210827aa371eaac269"
+  integrity sha512-r8EC6NO1sngH/zdD9fiRDLdcgnbayXah+mLgManTaIZJqEC1MZstmnox8KpnI2/fxQwrp5OpCOYWLp4rBl4Jcg==
+
 get-caller-file@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.3.tgz#f978fa4c90d1dfe7ff2d6beda2a515e713bdcf4a"
@@ -2735,6 +2835,11 @@ lodash@^4.13.1, lodash@^4.17.10, lodash@^4.17.4:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
   integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
 
+lodash@^4.17.13:
+  version "4.17.15"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+
 loose-envify@^1.0.0, loose-envify@^1.1.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"