v0.4.0

Added

• Support for all monitoring endpoints. @anthonator
• Support for all SSH key endpoints. @mazz-seven

Changed

• Added Elixir 1.12 to the test matrix. @anthonator
• Added Erlang 24 to the test matrix. @anthonator
• Removed Elixir 1.8 and 1.9 from the test matrix. @anthonator
• Removed Erlang 20 and 21 from the test matrix. @anthonator
• Use erlef/setup-beam instead of erlef/setup-elixir. @anthonator