Upgrade for v3.0.0 (jimmychu0807#163)

Author: Dan Forbes

package.json

@@ -16,14 +16,14 @@
     "deploy": "gh-pages -d build -m '[ci skip] Updates'"
   },
   "dependencies": {
-    "@polkadot/api": "~3.3.1",
-    "@polkadot/extension-dapp": "~0.35.1",
-    "@polkadot/keyring": "~5.2.3",
-    "@polkadot/types": "~3.3.1",
-    "@polkadot/ui-keyring": "~0.64.1",
-    "@polkadot/ui-settings": "~0.64.1",
-    "@polkadot/util": "~5.2.3",
-    "@polkadot/util-crypto": "~5.2.3",
+    "@polkadot/api": "~3.8.1",
+    "@polkadot/extension-dapp": "~0.37.1",
+    "@polkadot/keyring": "~5.6.2",
+    "@polkadot/types": "~3.8.1",
+    "@polkadot/ui-keyring": "~0.69.1",
+    "@polkadot/ui-settings": "~0.69.1",
+    "@polkadot/util": "~5.6.2",
+    "@polkadot/util-crypto": "~5.6.2",
     "prop-types": "~15.7.2",
     "query-string": "~6.13.5",
     "react": "~16.14.0",