Go library for parse environment variables to structs

 This is a Simple Golang library to parse environment variables to structs.
 Out of the box all built-in types are supported, plus a few others that are
 commonly used. Supports the following type:
 .
  - string
  - bool
  - int
  - int8
  - int16
  - int32
  - int64
  - uint
  - uint8
  - uint16
  - uint32
  - uint64
  - float32
  - float64
  - string
  - time.Duration
  - encoding.TextUnmarshaler
  - url.URL