When building a tag on travis, the tag name is used as the branch.
By default, only the `master` branch triggers a deployment, so for a version
tag the deployment to rubygems will be skipped.
This commit fixes it, by directly matching on the `TRAVIS_BRANCH` and
`TRAVIS_TAG` variables.
It reached EOL on 20th Jun 2018 and no longer receives patches.
* set required Ruby version to >= 2.3 in spec file
* set rubocop's TargetRubyVersion to 2.3 and fix all the offenses
```
$ rake install
rake aborted!
Gem::LoadError: You have already activated rake 12.3.0, but your Gemfile requires rake 12.3.1. Prepending `bundle exec` to your command may solve this.d
```
* use `bundle exec rake install` instead as suggested
* generate binstubs with bundler and prepend `bin/` to `PATH`
This option works the same as for GNU ls, although if not specified colorization
is on by default (the `auto` mode).
Using `--color` is equivalent to `--color=always`.
This generates `file://` links using ANSI escape sequences which opens the
given file using the default application for the file type on your system.
A terminal emulator supporting hyperlinks is required, otherwise the links
will be ignored.
* add `--sort=WORD` option, which sorts by modification "time" or not at all
* add short option `-U` to mean `--sort=none` (`ls` compatibility)
* `-t` now has the same effect as `--sort=time` which is also mentioned in the
post install mesage
* add checks for `--sort=time` and `--sort=none` to .travis.yml
* Added clubbed flags and renamed multi-character shorthand arguments to not interfere with clubbed flags
* Cleaned up code
* Fixed parsing arguments without dash
* Made -h flag clubbable
* Minor text fixes
* Cleaned up incompatible flags method
* added help flag
* updated .travis.yml
* added the list of all use-case commands
* changed rubocop
* made the necessary minor changes in helplog method and changed rubocop
