Drop testing with Ruby 1.9.2 and 2.1.0, and add 2.1.2 on Travis CI.
Drop testing with Ruby 1.9.2 and 2.1.0, and add 2.1.2 on Travis CI.

Signed-off-by: Krzysztof Wilczynski <9bf091559fc98493329f7d619638c79e91ccf029@linux.com>

kwilczynski/ruby-magic,kwilczynski/ruby-magic