Union types in params

[spaze]

• Support union types in params so you can disallow foo param value and it will be found in param types like 'foo'|'bar' (Support union types in params #163)

Internal:

• Add tests to ensure params with class-strings (Foo::class) are supported (Extra test to ensure FQCN::class is disallowed properly #161, thanks @ruudk also for the Blade-related chuckle)
• The Git default branch has been renamed from master to main

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This discussion was created from the release Union types in params.