Bump version and add v1-alpha5 API doc links

docs/docs/javadoc.md

@@ -49,3 +49,11 @@ The engine API documentation covers the core engine and all official subsystems.
   - [slf4j-compat](https://jd.engine.staropensource.de/v1-alpha4/slf4j-compat/)
   - [windowing](https://jd.engine.staropensource.de/v1-alpha4/windowing/)
   - [windowing:glfw](https://jd.engine.staropensource.de/v1-alpha4/windowing:glfw/)
+- v1-alpha5
+  - [All subsystem](https://jd.engine.staropensource.de/v1-alpha5/all/)
+  - [base](https://jd.engine.staropensource.de/v1-alpha5/base/)
+  - [testing](https://jd.engine.staropensource.de/v1-alpha5/testing/)
+  - [ansi](https://jd.engine.staropensource.de/v1-alpha5/ansi/)
+  - [slf4j-compat](https://jd.engine.staropensource.de/v1-alpha5/slf4j-compat/)
+  - [windowing](https://jd.engine.staropensource.de/v1-alpha5/windowing/)
+  - [windowing:glfw](https://jd.engine.staropensource.de/v1-alpha5/windowing:glfw/)

gradle.properties

@@ -21,7 +21,7 @@
 versioningCodename=Sugarcookie
 versioningVersion=1
 versioningType=alpha
-versioningTyperelease=5
+versioningTyperelease=6
 versioningFork=
 
 # Java