Update babel-loader to v7.0.0, but stick to babel-core 6.x

Gets rid of deprecation warnings.

Author: Andy Wermke

Diff for: packages/babel6/CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 1.0.0-beta
 
 - Use `match()` instead of passing an `exclude` option
+- Updated `babel-loader` from 6.x to 7.0, but sticking to babel 6.x
 
 ## 1.0.0-alpha
 

Diff for: packages/babel6/package.json

@@ -20,7 +20,7 @@
   "bugs": "https://github.com/andywer/webpack-blocks/issues",
   "dependencies": {
     "babel-core": "^6.25.0",
-    "babel-loader": "^6.4.1"
+    "babel-loader": "^7.0.0"
   },
   "devDependencies": {
     "@webpack-blocks/core": "^1.0.0-beta",