Changelog for vformat

V0.10.0

• Rewrite error system & fix bugs
• Fix document
• Rewrite unit tests

V0.11.0

• Simplify ArgKey
• Make generic instantiate FormatArg configurable
• Expose standard formatters
• Fix some issue and doc

V0.12.0

• Add defaultSpecs
• Remove FormatTime instance

V0.13.0

• Add FromArgKey typeclass
• Fix OVERLAPPABLE issue