Bump @babel/runtime from 7.4.0 to 7.4.2 (#49)

Bumps [@babel/runtime](https://github.com/babel/babel) from 7.4.0 to 7.4.2.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v7.4.0...v7.4.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -30,7 +30,7 @@
     "@babel/cli": "^7.2.3",
     "@babel/core": "^7.4.0",
     "@babel/node": "^7.2.2",
-    "@babel/runtime": "^7.4.0",
+    "@babel/runtime": "^7.4.2",
     "babel-eslint": "^10.0.1",
     "babel-loader": "^8.0.5",
     "babel-plugin-relay": "^3.0.0",

yarn.lock

@@ -818,10 +818,10 @@
   dependencies:
     regenerator-runtime "^0.12.0"
 
-"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.3.1", "@babel/runtime@^7.4.0":
-  version "7.4.0"
-  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.4.0.tgz#d523416573f19aa12784639e631257c7fc58c0aa"
-  integrity sha512-/eftZ45kD0OfOFHAmN02WP6N1NVphY+lBf8c2Q/P9VW3tj+N5NlBBAWfqOLOl96YDGMqpIBO5O/hQNx4A/lAng==
+"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.3.1", "@babel/runtime@^7.4.2":
+  version "7.4.2"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.4.2.tgz#f5ab6897320f16decd855eed70b705908a313fe8"
+  integrity sha512-7Bl2rALb7HpvXFL7TETNzKSAeBVCPHELzc0C//9FCxN8nsiueWSJBqaF+2oIJScyILStASR/Cx5WMkXGYTiJFA==
   dependencies:
     regenerator-runtime "^0.13.2"