diff --git a/yarn.lock b/yarn.lock
index 8f9b25e..096423d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,6 +2,16 @@
 # yarn lockfile v1
 
 
+"@types/babel-types@*", "@types/babel-types@^7.0.0":
+  version "7.0.7"
+  resolved "https://registry.yarnpkg.com/@types/babel-types/-/babel-types-7.0.7.tgz#667eb1640e8039436028055737d2b9986ee336e3"
+
+"@types/babylon@^6.16.2":
+  version "6.16.5"
+  resolved "https://registry.yarnpkg.com/@types/babylon/-/babylon-6.16.5.tgz#1c5641db69eb8cdf378edd25b4be7754beeb48b4"
+  dependencies:
+    "@types/babel-types" "*"
+
 accepts@~1.3.3:
   version "1.3.3"
   resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.3.tgz#c3ca7434938648c3e0d9c1e328dd68b622c284ca"
@@ -15,7 +25,7 @@ acorn-globals@^3.0.0:
   dependencies:
     acorn "^4.0.4"
 
-acorn@^3.1.0, acorn@~3.3.0:
+acorn@^3.1.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
 
@@ -57,6 +67,26 @@ async@^1.4.0:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
 
+babel-runtime@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.26.0.tgz#965c7058668e82b55d7bfe04ff2337bc8b5647fe"
+  dependencies:
+    core-js "^2.4.0"
+    regenerator-runtime "^0.11.0"
+
+babel-types@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-types/-/babel-types-6.26.0.tgz#a3b073f94ab49eb6fa55cd65227a334380632497"
+  dependencies:
+    babel-runtime "^6.26.0"
+    esutils "^2.0.2"
+    lodash "^4.17.4"
+    to-fast-properties "^1.0.3"
+
+babylon@^6.18.0:
+  version "6.18.0"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.18.0.tgz#af2f3b88fa6f5c1e4c634d1a0f8eac4f55b395e3"
+
 base64url@2.0.0, base64url@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/base64url/-/base64url-2.0.0.tgz#eac16e03ea1438eff9423d69baa36262ed1f70bb"
@@ -147,11 +177,13 @@ component-emitter@~1.2.0:
   resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.2.1.tgz#137918d6d78283f7df7a6b7c5a63e140e69425e6"
 
 constantinople@^3.0.1:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/constantinople/-/constantinople-3.1.0.tgz#7569caa8aa3f8d5935d62e1fa96f9f702cd81c79"
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/constantinople/-/constantinople-3.1.2.tgz#d45ed724f57d3d10500017a7d3a889c1381ae647"
   dependencies:
-    acorn "^3.1.0"
-    is-expression "^2.0.1"
+    "@types/babel-types" "^7.0.0"
+    "@types/babylon" "^6.16.2"
+    babel-types "^6.26.0"
+    babylon "^6.18.0"
 
 content-disposition@0.5.2:
   version "0.5.2"
@@ -173,6 +205,10 @@ cookiejar@2.0.6:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/cookiejar/-/cookiejar-2.0.6.tgz#0abf356ad00d1c5a219d88d44518046dd026acfe"
 
+core-js@^2.4.0:
+  version "2.6.10"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.10.tgz#8a5b8391f8cc7013da703411ce5b585706300d7f"
+
 core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -240,6 +276,10 @@ escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
 
+esutils@^2.0.2:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.3.tgz#74d2eb4de0b8da1293711910d50775b9b710ef64"
+
 etag@~1.8.0:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.0.tgz#6f631aef336d6c46362b51764044ce216be3c051"
@@ -363,13 +403,6 @@ is-expression@^1.0.0:
     acorn "~2.7.0"
     object-assign "^4.0.1"
 
-is-expression@^2.0.1:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/is-expression/-/is-expression-2.1.0.tgz#91be9d47debcfef077977e9722be6dcfb4465ef0"
-  dependencies:
-    acorn "~3.3.0"
-    object-assign "^4.0.1"
-
 is-promise@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-2.1.0.tgz#79a2a9ece7f096e80f36d2b2f3bc16c1ff4bf3fa"
@@ -461,7 +494,7 @@ lodash.once@^4.0.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/lodash.once/-/lodash.once-4.1.1.tgz#0dd3971213c7c56df880977d504c88fb471a97ac"
 
-lodash@^4.17.11:
+lodash@^4.17.11, lodash@^4.17.4:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
 
@@ -735,6 +768,10 @@ reduce-component@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/reduce-component/-/reduce-component-1.0.1.tgz#e0c93542c574521bea13df0f9488ed82ab77c5da"
 
+regenerator-runtime@^0.11.0:
+  version "0.11.1"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"
+
 regexp-clone@1.0.0, regexp-clone@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/regexp-clone/-/regexp-clone-1.0.0.tgz#222db967623277056260b992626354a04ce9bf63"
@@ -867,6 +904,10 @@ superagent@^1.8.3:
     readable-stream "1.0.27-1"
     reduce-component "1.0.1"
 
+to-fast-properties@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
+
 token-stream@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/token-stream/-/token-stream-0.0.1.tgz#ceeefc717a76c4316f126d0b9dbaa55d7e7df01a"