Update babylon to v7.0.0-beta.8

Author: fkling

package.json

@@ -30,7 +30,7 @@
   "dependencies": {
     "async": "^2.1.4",
     "babel-runtime": "^6.9.2",
-    "babylon": "7.0.0-beta.4",
+    "babylon": "v7.0.0-beta.8",
     "commander": "^2.9.0",
     "doctrine": "^2.0.0",
     "node-dir": "^0.1.10",

yarn.lock

@@ -731,14 +731,14 @@ babel-types@^6.15.0, babel-types@^6.18.0, babel-types@^6.19.0, babel-types@^6.22
     lodash "^4.2.0"
     to-fast-properties "^1.0.1"
 
-[email protected]:
-  version "7.0.0-beta.4"
-  resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.4.tgz#82db799d2667f61bbaf34456dbfa91c37613459d"
-
 babylon@^6.11.0, babylon@^6.13.0, babylon@^6.15.0:
   version "6.16.1"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.16.1.tgz#30c5a22f481978a9e7f8cdfdf496b11d94b404d3"
 
+[email protected]:
+  version "7.0.0-beta.8"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.8.tgz#2bdc5ae366041442c27e068cce6f0d7c06ea9949"
+
 balanced-match@^0.4.1:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"