howzit 2.0.21

• bump 0.10.0 ~> 0.5

• bundler 2.5.14 ~> 2.2

• cli-test 1.0.0 ~> 1.0

• fuubar 2.5.1 ~> 2.0

• github-markup 1.7.0 ~> 1.3

• guard 2.18.1 ~> 2.11

• guard-rspec 4.7.3 ~> 4.5

• guard-rubocop 1.5.0 ~> 1.2

• guard-yard 2.2.1 ~> 2.1

• rake 11.3.0 ~> 11.2

• redcarpet 3.6.0 ~> 3.2

• rspec 3.13.0 ~> 3.1

• rubocop 0.93.1 ~> 0.28

• simplecov 0.22.0 ~> 0.9

• tty-spinner 0.9.3 ~> 0.9

• yard 0.9.36 ~> 0.9.5