• support parsing week directives (%A, %a, %w, %u, %V, %U, %W)
• validate range of values on parsing directives
• fix formatting %l to show 12 at midnight

• support parsing time zone offset with name using both %z and %Z

• improve documents
• drop support for Go 1.16

• implement ParseInLocation for configuring the default location

• implement parsing/formatting time zone offset with colons (%:z, %::z, %:::z)
• recognize Z as UTC on parsing time zone offset (%z)
• fix padding on formatting time zone offset (%z)

• Fix compile error on 32-bit architectures.

Initial release.