Bump version and add changelog for v1.9.3

CHANGELOG.md

@@ -1,3 +1,16 @@
+1.9.3 - 2020-08-02
+==================
+
+- Removed dead import of deprecated symbol `enforceEx` - [pull #214][issue214]
+- Improved error messages for non-implemented interfaces - [pull #216][issue216]
+- Improved internal unittests to be forward-compatible - [pull #213][pull213] and [pull #215][pull215]
+
+[issue213]: https://github.com/vibe-d/vibe-core/issues/213
+[issue214]: https://github.com/vibe-d/vibe-core/issues/214
+[issue215]: https://github.com/vibe-d/vibe-core/issues/215
+[issue216]: https://github.com/vibe-d/vibe-core/issues/216
+
+
 1.9.2 - 2020-05-28
 ==================
 

source/vibe/core/core.d

@@ -1105,7 +1105,7 @@ void setTaskCreationCallback(TaskCreationCallback func)
 /**
 	A version string representing the current vibe.d core version
 */
-enum vibeVersionString = "1.9.2";
+enum vibeVersionString = "1.9.3";
 
 
 /**