AnsiConsole.err.fluss bug fix.

AnsiConsole.err did not flush by default, causing
colors to "spill over" in the next print statements.
Consistent println in all test suites.
Testsuite cleanup: move config file selection in a separated method.
Bump version for a release (the flush fix)
Merge branch 'master' of git@github.com:mihnita/java-color-loggers.git