Bump provider-engine from 7.8.1 to 7.8.3 (#435)

* Bump provider-engine from 7.8.1 to 7.8.3

* Modify changelog.

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 - Fix rendering of recipient SVG in tx approval notification.
 - New vaults now generate only one wallet instead of three.
+- Bumped version of web3 provider engine.
+- Fixed bug where some lowercase or uppercase addresses were not being recognized as valid.
 
 ## 2.6.0 2016-07-11
 

package.json

@@ -65,7 +65,7 @@
     "through2": "^2.0.1",
     "vreme": "^3.0.2",
     "web3": "ethereum/web3.js#0.16.0",
-    "web3-provider-engine": "^7.8.1",
+    "web3-provider-engine": "^7.8.3",
     "web3-stream-provider": "^2.0.5",
     "xtend": "^4.0.1"
   },