add unbundled es6 build with jsx file extensions

Author: DouglasDev

.gitignore

@@ -7,5 +7,6 @@ package-lock.json
 /lazy
 /demo
 /coverage
+/es6
 .idea/
 .vscode/

package.json

@@ -19,6 +19,7 @@
     "build:demo": "cross-env NODE_ENV=production webpack --config webpack/production.babel.js",
     "build:dist": "cross-env NODE_ENV=production webpack --config webpack/dist.babel.js",
     "build:standalone": "cross-env NODE_ENV=production webpack --config webpack/standalone.babel.js && node scripts/standalone-es6.js",
+    "build:es6": "rsync --exclude demo -r ./src/ ./es6/ && find ./es6/ -name '*.js' -exec grep -q 'import React' {} \\; -exec mv {} {}x \\;",
     "preversion": "npm run lint && npm run test",
     "version": "auto-changelog -p && npm run build:dist && npm run build:standalone && git add CHANGELOG.md dist",
     "prepublishOnly": "npm run build:lib && npm run build:lazy && npm run build:dist && node scripts/pre-publish.js && cp -r types/* .",