Pin dependency @babel/runtime to 7.3.4

Author: renovate-bot

package.json

@@ -148,7 +148,7 @@
   },
   "devDependencies": {
     "@babel/core": "7.3.4",
-    "@babel/runtime": "^7.3.4",
+    "@babel/runtime": "7.3.4",
     "ajv": "6.10.0",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "10.0.1",

yarn.lock

@@ -608,7 +608,7 @@
     pirates "^4.0.0"
     source-map-support "^0.5.9"
 
-"@babel/runtime@^7.0.0", "@babel/runtime@^7.3.1", "@babel/runtime@^7.3.4":
+"@babel/runtime@7.3.4", "@babel/runtime@^7.0.0", "@babel/runtime@^7.3.1":
   version "7.3.4"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.3.4.tgz#73d12ba819e365fcf7fd152aed56d6df97d21c83"
   integrity sha512-IvfvnMdSaLBateu0jfsYIpZTxAc2cKEXEMiezGGN75QcBcecDUKd3PgLAncT0oOgxKy8dd8hrJKj9MfzgfZd6g==