Increase tests to over 50% coverage

[digitalghost-dev]

Several files do not have their main functions tested or do not have a test file. The current files test running the CLI tool but is a bit redundant since cli_test.go tests command input and capturing output.

• cmd/pokemon.go and cmd/types.go have none of their functions tested
• flags/pokemonflagset.go is not testing the AbilitiesFlag() or TypesFlag().
• flags/version.go is missing a test file.