More work on variable usage

package.json

@@ -36,12 +36,12 @@
     },
     "devDependencies": {
         "ansi-colors": "^3.2.4",
-        "aws-sdk": "^2.422.0",
-        "@babel/core": "^7.3.4",
-        "@babel/preset-env": "^7.3.4",
+        "aws-sdk": "^2.427.0",
+        "@babel/core": "^7.4.0",
+        "@babel/preset-env": "^7.4.2",
         "babel-eslint": "^10.0.1",
         "del": "^4.0.0",
-        "eslint": "^5.15.2",
+        "eslint": "^5.15.3",
         "eslint-config-airbnb-base": "^13.1.0",
         "eslint-config-prettier": "^4.1.0",
         "eslint-plugin-import": "^2.16.0",
@@ -70,8 +70,8 @@
         "prettier-eslint": "^8.8.2",
         "prettier-stylelint": "^0.4.2",
         "remark-cli": "^6.0.1",
-        "remark-validate-links": "^8.0.1",
-        "rollup": "^1.6.0",
+        "remark-validate-links": "^8.0.2",
+        "rollup": "^1.7.3",
         "rollup-plugin-babel": "^4.3.2",
         "rollup-plugin-commonjs": "^9.2.1",
         "rollup-plugin-node-resolve": "^4.0.1",
@@ -85,7 +85,7 @@
         "through2": "^3.0.1"
     },
     "dependencies": {
-        "core-js": "^2.6.5",
+        "core-js": "^3.0.0",
         "custom-event-polyfill": "^1.0.6",
         "loadjs": "^3.6.0",
         "rangetouch": "^2.0.0",