Bump babel-core from 6.26.0 to 6.26.3

Bumps [babel-core](https://github.com/babel/babel) from 6.26.0 to 6.26.3.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v6.26.0...v6.26.3)

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

yarn.lock

@@ -271,8 +271,8 @@ babel-code-frame@^6.26.0:
     js-tokens "^3.0.2"
 
 babel-core@^6.23.1, babel-core@^6.26.0:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-core/-/babel-core-6.26.0.tgz#af32f78b31a6fcef119c87b0fd8d9753f03a0bb8"
+  version "6.26.3"
+  resolved "https://registry.yarnpkg.com/babel-core/-/babel-core-6.26.3.tgz#b2e2f09e342d0f0c88e2f02e067794125e75c207"
   dependencies:
     babel-code-frame "^6.26.0"
     babel-generator "^6.26.0"
@@ -284,15 +284,15 @@ babel-core@^6.23.1, babel-core@^6.26.0:
     babel-traverse "^6.26.0"
     babel-types "^6.26.0"
     babylon "^6.18.0"
-    convert-source-map "^1.5.0"
-    debug "^2.6.8"
+    convert-source-map "^1.5.1"
+    debug "^2.6.9"
     json5 "^0.5.1"
     lodash "^4.17.4"
     minimatch "^3.0.4"
     path-is-absolute "^1.0.1"
-    private "^0.1.7"
+    private "^0.1.8"
     slash "^1.0.0"
-    source-map "^0.5.6"
+    source-map "^0.5.7"
 
 babel-generator@^6.26.0:
   version "6.26.0"
@@ -1181,10 +1181,16 @@ content-type@~1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
 
-convert-source-map@^1.3.0, convert-source-map@^1.5.0:
+convert-source-map@^1.3.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.5.0.tgz#9acd70851c6d5dfdd93d9282e5edf94a03ff46b5"
 
+convert-source-map@^1.5.1:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.6.0.tgz#51b537a8c43e0f04dec1993bffcdd504e758ac20"
+  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"
@@ -1328,7 +1334,7 @@ debug@2.2.0, debug@~2.2.0:
   dependencies:
     ms "0.7.1"
 
-debug@2.6.9, debug@^2.2.0, debug@^2.3.3, debug@^2.6.6, debug@^2.6.8:
+debug@2.6.9, debug@^2.2.0, debug@^2.3.3, debug@^2.6.6, debug@^2.6.8, debug@^2.6.9:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   dependencies:
@@ -3894,7 +3900,7 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-private@^0.1.6, private@^0.1.7:
+private@^0.1.6, private@^0.1.8:
   version "0.1.8"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.8.tgz#2381edb3689f7a53d653190060fcf822d2f368ff"
 
@@ -4553,7 +4559,7 @@ source-map@^0.4.4, source-map@~0.4.1:
   dependencies:
     amdefine ">=0.0.4"
 
-source-map@^0.5.3, source-map@^0.5.6, source-map@~0.5.1, source-map@~0.5.6:
+source-map@^0.5.3, source-map@^0.5.6, source-map@^0.5.7, source-map@~0.5.1, source-map@~0.5.6:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"