run continuous integration across a bunch of bash versions (similar to https://github.com/sdolenc/debian-matrix )
| bash ver | released |
|---|---|
| 5.0 | Jan 2019 |
| 4.4 | Sep 2016 |
| 4.3 | Feb 2014 |
| 4.2 | Feb 2011 |
| 4.1 | Dec 2009 |
| 4.0 | Feb 2009 |
| 3.2 | Oct 2006 |
| 3.1 | Dec 2005 |
| 3.0 | Aug 2004 |
| 2.05b | Jul 2002 |
| 2.05a | Nov 2001 |
| 2.03 | Feb 1999 |