update to latest version of ConfigurationOfMetacello ... pull in recent .travis.yml improvements (includes tests on Squeak4.5)
add 4.3.x, 4.4.x and 4.5.x default platform attributes as requested in Issue #141
1.0-beta.31.1.6 (dkh.753);
- fix Issue 141 - squeak4.3.x and squeak4.4.x added as platform attributes
  https://github.com/dalehenrich/metacello-work/issues/141
have to use our own version of testTravisCI.sh using -X flag ... fix a Warning issue that showed up in Pharo-1.4
Merge branch '1.0-beta.31.1.6' into 1.0-beta.31: bugfixes for Issue #141 (and release of 1.0-beta.31.1.6)