doc: updated credits and changelog.

doc/changelog.dox

@@ -449,6 +449,8 @@ See also:
 
 @subsubsection changelog-latest-changes-shaders Shaders library
 
+-   All shaders now have rendering output tests, making them more robust for
+    future additions and refactorings. See also [mosra/magnum#382](https://github.com/mosra/magnum/pull/382).
 -   @ref Shaders::Phong now clamps the specular factor to minimize artifacts
     when shininess is near zero
 -   @ref Shaders::Phong can now handle zero lights, in which case its output is
@@ -681,6 +683,7 @@ See also:
     (see [mosra/magnum#367](https://github.com/mosra/magnum/issues/367))
 -   The @ref getting-started "Getting Started Guide" was rewritten to be easier
     to follow for Windows users, removing usual pain points (see
+    [mosra/magnum#377](https://github.com/mosra/magnum/issues/377) and
     [mosra/magnum#378](https://github.com/mosra/magnum/issues/378))
 
 @subsection changelog-latest-deprecated Deprecated APIs

doc/credits.dox

@@ -145,6 +145,8 @@ Are the below lists missing your name or something's wrong?
     bugreports, API design direction
 -   **Mandeep Singh Baines** ([\@msbaines](https://github.com/msbaines)) ---
     WebGL 2 build fixes
+-   **Marco Melorio** ([\@Melix19](https://github.com/Melix19)) --- iOS test
+    updates and fixes
 -   **Max Schwarz** ([\@xqms](https://github.com/xqms)) --- `Any*` plugin
     improvements, fixes in the @ref GL library
 -   **Michael Tao** ([\@mtao](https://github.com/mtao)) --- Gentoo build fixes