Update changelog for linter improvements

CHANGELOG.md

@@ -44,12 +44,24 @@ To install or update CocoaPods see this [guide](http://docs.cocoapods.org/guides
   [Joshua Kalpin](https://github.com/Kapin)
   [Core#39](https://github.com/CocoaPods/Core/pull/39)
   [#1610](https://github.com/CocoaPods/CocoaPods/issues/1610)
+  
 * Having the silent flag enabled in the config will no longer cause issues
   with `pod search`. In addition, the flag `--silent` is no longer supported
   for the command.  
   [Joshua Kalpin](https://github.com/Kapin)
   [#1627](https://github.com/CocoaPods/CocoaPods/pull/1627)
 
+* The linter will now display an error if a framework ends with `.framework`
+  (i.e. `QuartzCore.framework`).  
+  [Joshua Kalpin](https://github.com/Kapin)
+  [#1331](https://github.com/CocoaPods/CocoaPods/issues/1336)
+  [Core#45](https://github.com/CocoaPods/Core/pull/45)
+
+* The linter will now display an error if a library ends with `.a` or `.dylib`
+  (i.e. `libz.dylib`)  
+  [Joshua Kalpin](https://github.com/Kapin)
+  [Core#44](https://github.com/CocoaPods/Core/issues/44)
+
 
 ## 0.28.0
 [CocoaPods](https://github.com/CocoaPods/CocoaPods/compare/0.27.1...0.28.0)