v0.7.0

This release drops support for Go 1.17, continues support for Go 1.18, and adds initial support for the upcoming Go 1.19.

Noteworthy changes include:

• Initial support for obfuscating generic code - #414
• Remove unused imports in -literals more reliably - #481
• Support obfuscating package paths ending with .go - #539
• Support installing garble in paths containing spaces - #544
• Avoid a panic when obfuscating variadic functions - #524
• Avoid a "refusing to list package" panic in garble test - #522
• Some module builds are now used as regression tests - #240

Thanks to @lu4p, @pagran, and @shellhazard for their contributions in this release!