Merge pull request #5834 from ethereum/prepareRelease

Update changelog for release.

Changelog.md

@@ -1,4 +1,4 @@
-### 0.5.3 (unreleased)
+### 0.5.3 (2019-01-22)
 
 Language Features:
  * Provide access to creation and runtime code of contracts via ``type(C).creationCode`` / ``type(C).runtimeCode``.

docs/bugs_by_version.json

@@ -620,5 +620,9 @@
     "0.5.2": {
         "bugs": [],
         "released": "2018-12-19"
+    },
+    "0.5.3": {
+        "bugs": [],
+        "released": "2019-01-22"
     }
 }