remove .npmignore cause of it will not work if installing a local package; update rn version to 0.56.0 for demo

.npmignore

-demo

demo/package.json

     "test": "jest"
   },
   "dependencies": {
-    "react": "^16.3.1",
-    "react-native": "^0.55.3",
+    "react": "^16.4.1",
+    "react-native": "^0.56.0",
     "react-native-autoheight-webview": "../"
   },
   "devDependencies": {
     "babel-jest": "21.2.0",
-    "babel-preset-react-native": "4.0.0",
+    "babel-preset-react-native": "^5.0.1",
     "jest": "21.2.1",
-    "react-test-renderer": "16.0.0"
+    "react-test-renderer": "16.4.1"
   },
   "jest": {
     "preset": "react-native"

package-lock.json

 {
   "name": "react-native-autoheight-webview",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "lockfileVersion": 1,
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         "doctrine": "2.1.0",
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+        "prop-types": "15.6.2"
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+      "dev": true,
       "requires": {
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+      "dev": true
     },
     "semver": {
       "version": "5.5.0",
       "integrity": "sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==",
       "dev": true
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package.json

   "description": "An auto height webview for React Native",
   "main": "autoHeightWebView",
   "files": [
-    "android/",
-    "autoHeightWebView/"
+    "android",
+    "autoHeightWebView"
   ],
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "dependencies": {
     "immutable": "^3.8.1",
-    "prop-types": "^15.5.10"
+    "prop-types": "^15.6.2"
   },
   "devDependencies": {
     "babel-eslint": "^8.2.2",