fix: pin babel-plugin-add-module-exports to 1.0.0

Author: greenkeeper[bot]

package.json

@@ -61,7 +61,7 @@
     "babel-core": "^6.26.3",
     "babel-eslint": "^10.0.1",
     "babel-loader": "^8.0.5",
-    "babel-plugin-add-module-exports": "^1.0.0",
+    "babel-plugin-add-module-exports": "1.0.0",
     "babel-plugin-transform-es2015-modules-umd": "^6.24.1",
     "babel-preset-env": "^1.7.0",
     "chai": "^4.1.2",