Update english requirement to 0.7.0

[zandabanda]

Pull Request Checklist

Is this in reference to an existing issue?

General

• [x] Update Changelog following the conventions laid out here

• [x] Update README with any necessary configuration snippets

• [x] Binstubs are created if needed

• [x] RuboCop passes

• [x] Existing tests pass

New Plugins

• [x] Tests

• [x] Add the plugin to the README

• [x] Does it have a complete header as outlined here

Purpose

Known Compatibility Issues

[hsbt]

This is the correct change.

See https://github.com/ruby/English/issues/1#issuecomment-613127885

[xblitz]

@portertech can you also merge this one?

[jspaleta]

@xblitz Hey, so I'm going to roll this in among a couple of other changes that are needed, including updating some other deps.

This will end up being a major release bump.