doc: updated changelog and credits.

doc/changelog.dox

@@ -111,6 +111,8 @@ See also:
 
 -   Experimental support for creating Android APKs directly using CMake without
     Gradle involved. See @ref platforms-android-apps for more information.
+-   Initial scaffolding for [Hunter](https://hunter.sh) package support (see
+    [mosra/magnum#298](https://github.com/mosra/magnum/pull/298))
 -   The `Magnum::AndroidApplication` target was missing a few dependency
     libraries when Magnum was used as a CMake subproject
 -   Fixed an ambiguous overload error in @ref Text::GlyphCache when compiling

doc/credits.dox

@@ -128,7 +128,7 @@ Are the below lists missing your name or something's wrong?
 -   **Olga Turanksaya** ([\@olga-python](https://github.com/olga-python)) ---
     Gentoo ebuild
 -   **Pascal Thomet** ([\@pthom](https://github.com/pthom)) --- C++17
-    compilation fixes, buildsystem improvements
+    compilation fixes, buildsystem improvements, Hunter package
 -   **Sam Spilsbury** ([\@smspillaz](https://github.com/smspillaz)) --- WebGL
     and GLES fixes
 -   **Samuel Kogler** ([\@skogler](https://github.com/skogler)) ---