Upgrade react-native-webview to 8.0.4 for demo

demo/ios/Podfile.lock

     - React-cxxreact (= 0.61.5)
     - React-jsi (= 0.61.5)
   - React-jsinspector (0.61.5)
-  - react-native-webview (8.0.2):
+  - react-native-webview (8.0.4):
     - React
   - React-RCTActionSheet (0.61.5):
     - React-Core/RCTActionSheetHeaders (= 0.61.5)
   React-jsi: cb2cd74d7ccf4cffb071a46833613edc79cdf8f7
   React-jsiexecutor: d5525f9ed5f782fdbacb64b9b01a43a9323d2386
   React-jsinspector: fa0ecc501688c3c4c34f28834a76302233e29dc0
-  react-native-webview: 99bdfd6c189772b0f15494f728430c23b18b93e4
+  react-native-webview: 3f5aa91c3cb083ea4762e006b9653291a96a777a
   React-RCTActionSheet: 600b4d10e3aea0913b5a92256d2719c0cdd26d76
   React-RCTAnimation: 791a87558389c80908ed06cc5dfc5e7920dfa360
   React-RCTBlob: d89293cc0236d9cb0933d85e430b0bbe81ad1d72

demo/package.json

     "react": "16.9.0",
     "react-native": "0.61.5",
     "react-native-autoheight-webview": "../",
-    "react-native-webview": "^8.0.3"
+    "react-native-webview": "^8.0.4"
   },
   "devDependencies": {
     "@babel/core": "^7.5.0",

demo/yarn.lock

   dependencies:
     prop-types "^15.7.2"
 
-react-native-webview@^8.0.3:
-  version "8.0.3"
-  resolved "https://registry.yarnpkg.com/react-native-webview/-/react-native-webview-8.0.3.tgz#1dcd30de28aa4bdb314b4fa8a60e0abc2431a9d4"
-  integrity sha512-Uhd3o73HcqiQ0GWxyz5G5+Jkh1dd1A8Kz/rCYHiX/Ctkg3KO9qrZUmzRetq5y9X1+fUH9XJt6+LO3iO/Dxopfw==
+react-native-webview@^8.0.4:
+  version "8.0.4"
+  resolved "https://registry.yarnpkg.com/react-native-webview/-/react-native-webview-8.0.4.tgz#4951df32bd54f6fa16bc0eda5e6e6762d8b83ba8"
+  integrity sha512-XEatna1wwF43Rg500HaDIC/MS2IAob/PvjkTePCevs9wQz90SwERTjGZNuM2WxH+JwrZrxoilGBOn34vQTTJkw==
   dependencies:
     escape-string-regexp "2.0.0"
     invariant "2.2.4"