chore: bump Changelog to version 0.2

Changelog.md

@@ -1,4 +1,43 @@
 
+<a name="v0.2"></a>
+## [v0.2](https://git.gfz-potsdam.de/sec34/btcsdiffusion/compare/v0.1...v0.2) (2022-08-16)
+
+### Build System
+
+* fetch doctest during configuration
+
+### Ci
+
+* disable testing during static analyze
+* add git as dependency
+
+### Code Refactoring
+
+* remove BTCSUtils header from include API
+
+### Code Style
+
+* fix various code style recommendations from clang
+* Use enumerations for macros and use more useful function names
+
+### Documentation
+
+* update Roadmap and add Contributing section
+
+### Features
+
+* support for inner closed cells in diffusion module
+* add setting of inner boundary conditions
+
+### Housework
+
+* configure git-chglog for new commit style
+
+### Testing
+
+* add new test case for diffusion module
+* add tests for inner boundary conditions
+
 <a name="v0.1"></a>
 ## v0.1 (2022-08-09)
 
@@ -10,3 +49,4 @@
 * Software testing of both `BTCSDiffusion` and `BTCSBoundaryCondition` classes
 * Description of both BTCS and 2D-ADI-BTCS schemes are provided in `doc`
 * Example applications are attached in `app` subdirectory
+