featureflag 0.2.0

• Added percentage feature flags
• Added time period feature flags
• Added connect user feature flags (#31)
• Added connect group feature flags (#30)
• Added env var feature flags (#37)
• Fix missing error messages in flag constructors (#38)
• Fix: bool feature flags throw an error when ‘NA’ is passed (#39)

featureflag 0.1.0

• Added helper functions that correspond to if {} and if {} else {} blocks
• Added boolean feature flags
• Added a NEWS.md file to track changes to the package.