- Rewrite with typescript.

- Update react to v16.6.0
Merge branch 'feature-typescript'

# Conflicts:
#	.babelrc
#	lib/components/Checkbox.js
#	lib/components/Radiobox.js
#	lib/components/Select.js
#	lib/components/Textarea.js
#	lib/components/Textbox.js
#	lib/components/message.js
#	lib/react-inputs-validation.js
#	lib/react-inputs-validation.js.map
#	lib/react-inputs-validation.min.js
#	package.json
#	src/__tests__/Checkbox.js
#	src/__tests__/Radiobox.js
#	src/__tests__/Select.js
#	src/__tests__/Textarea.js
#	src/__tests__/Textbox.js
#	src/__tests__/utils.js
#	src/js/Inputs/Checkbox.js
#	src/js/Inputs/Radiobox.js
#	src/js/Inputs/Select.js
#	src/js/Inputs/Textarea.js
#	src/js/Inputs/Textbox.js
#	src/js/Inputs/message.js

Author: Edward Xiao

.babelrc

@@ -1,9 +1,5 @@
 {
-    "presets": [
-        "es2015",
-        "stage-0",
-        "react"
-    ],
+    "presets": ["@babel/preset-env", "@babel/preset-react", "@babel/preset-typescript"],
     "env":
     {
         "development":
@@ -16,7 +12,11 @@
         },
         "lib":
         {
-            "plugins": ["css-modules-transform"],
+            "plugins": [
+                "css-modules-transform",
+                "@babel/proposal-class-properties",
+                "@babel/proposal-object-rest-spread"
+            ],
         },
         "test":
         {