Version 0.5.0.0

Dotenv 0.5.0.0

• Add dotenv-safe functionality
• Add the Config type with options to override env variables, and setting the
  path for .env and .env.example files.
• Changed loadFile function to get Config with the paths for the .env file
  and the .env.example file.

Dotenv 0.4.0.0

• Use Megaparsec 6.0
• Dropped support for GHC 7.6

Dotenv 0.3.4.0

• Allow optparse-applicative 0.14