Updates the readme to include a note about upgrading the gem to version 3 and that it can default to doing nothing.

Reverted tag to to use `v*` prefix instead of `release/v*`.

Bumps [loofah](https://github.com/flavorjones/loofah) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/flavorjones/loofah/releases)
- [Changelog](https://github.com/flavorjones/loofah/blob/master/CHANGELOG.md)
- [Commits](https://github.com/flavorjones/loofah/compare/v2.3.0...v2.3.1)
Signed-off-by: dependabot[bot] <support@github.com>

Setting the default to annotate models as it is the main feature of the gem

Based on the official docs:

https://help.github.com/en/articles/configuring-a-workflow#adding-a-workflow-status-badge-to-your-repository

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.6.6.2 to 1.10.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.6.6.2...v1.10.4)
Signed-off-by: dependabot[bot] <support@github.com>

Updates the requirements on [rake](https://github.com/ruby/rake) to permit the latest version.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](https://github.com/ruby/rake/compare/v10.4.0...v13.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Before, whenever a new file is added to `lib`, the contributor or
maintainer has to remember to explicitly add it to the gemspec. If this
step is forgotten, it results in a broken release, like #657.

This commit makes this process less error prone by using `git ls-files`
to automatically include all appropriate files in the gem. This is in
line with what is advocated by Bundler's gem template:

https://github.com/bundler/bundler/blob/2a4d88a7044528209321fd4441e995ec66f604b9/lib/bundler/templates/newgem/newgem.gemspec.tt#L26

Add opening parenthesis

Currently the gem released as version 3.0.0 is broken. Fixes #657 

The gem is missing constants.rb and parser.rb file

Changed references to `--additional_file_patterns` to be `--additional-file-patterns` to make it consistent with other flags.

Adds tests for `.include_routes?`, `.include_models?`, `.skip_on_migration?`. Also moves the `TRUE_RE` under the `Annotate::Constants` namespace.

Updating tested ruby versions to use latest versions.

* Bump ruby 2.4.6 -> 2.4.7
* Bump ruby 2.5.5 -> 2.5.6
* Add ruby 2.6.4
* Remove old versions of 2.6.X

Prior to this change, `Annotate.include_models?` returned the inverse of `Annotate.include_routes?`. This made it so annotating models and routes was not possible to do together.

This PR adds an explicit `--models` flag and also adds it the option to `lib/generators/annotate/templates/auto_annotate_models.rake` with the default being set to `false`. 

Fixes #563 and undoes the bug introduced in #485.

In looking into #563, I realized there are gaps in test coverage. For example, `bin/annotate` doesn't have any tests. 

Tidying the spec directory to make it easier to add tests in future work.

Add better documentation for new option for additional file patterns. Implemented in #633 and #636.

Adds option for additional file patterns (implemented in #633) in the CLI.

Refactored Parser to isolate changes being made to ENV. This way we have an intermediate step where we know the environment variables being set.

The RubyGems gemspec property `rubyforge_project` has been removed without a replacement.

Refer to https://github.com/rubygems/rubygems/pull/2436