Documentation update

Author: mkarlesky

README.md

@@ -3,18 +3,18 @@ Cross-compilation C unit testing environment with Unity, CMock, and Ceedling.
 
 ## Contents
 * Testing tools
-  * [Ceedling](http://www.throwtheswitch.org/ceedling) 0.29.1
-  * [CMock](http://www.throwtheswitch.org/cmock) 2.5.1
-  * [Unity](http://www.throwtheswitch.org/unity) 2.5.0
+  * [Ceedling](http://www.throwtheswitch.org/ceedling) 0.30.0
+  * [CMock](http://www.throwtheswitch.org/cmock) 2.5.2
+  * [Unity](http://www.throwtheswitch.org/unity) 2.5.1
 * C support
   * [CException](http://www.throwtheswitch.org/cexception) 1.3.2
-  * [libc-dev 0.7.1](https://pkgs.alpinelinux.org/package/v3.8/main/x86/libc-dev)
+  * [libc-dev 0.7.2](https://pkgs.alpinelinux.org/package/v3.11/main/x86/libc-dev)
 * Environment
-  * [coreutils 8.29](https://pkgs.alpinelinux.org/package/v3.8/main/x86/coreutils)
-  * gcc 6.4.0
-  * gcov 6.4.0
-  * valgrind 3.13.0
-  * Ruby 2.4.5
+  * [coreutils 8.31](https://pkgs.alpinelinux.org/package/v3.11/main/x86/coreutils)
+  * gcc 9.2.0
+  * gcov 9.2.0
+  * valgrind 3.15.0
+  * Ruby 2.7.1
 
 ## Usage
 `docker run -it --rm -v <local project path>:/project throwtheswitch/madsciencelab[:tag]`