chore: Upgrading classnames package to 2.2.6 (#197)

* chore: Upgrading classnames package

Upgrading classnames package to fix ie10 transpiling issues

* chore: Fixing bundle.js

Fixing bundle.js and classnames source registry

* chore: Reverting test file

Reverting flatten-tree.test.js

Author: dilip025

docs/bundle.js

@@ -43,7 +43,7 @@
   ],
   "dependencies": {
     "array.partial": "^1.0.4",
-    "classnames": "^2.2.5",
+    "classnames": "^2.2.6",
     "react-infinite-scroll-component": "^4.0.2"
   },
   "devDependencies": {

package.json

@@ -2728,7 +2728,7 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
-classnames@^2.2.5:
+classnames@^2.2.5, classnames@^2.2.6:
   version "2.2.6"
   resolved "https://registry.yarnpkg.com/classnames/-/classnames-2.2.6.tgz#43935bffdd291f326dad0a205309b38d00f650ce"