bcrypt 1.2.0

This package use jBCrypt modified code to work with Dart VM.

1.2.0

• Bump package metadata/docs to 1.2.0 and add the lint style badge to the README.
• Update the gensalt prefix tests to only assert the supported prefixes (2a, 2b, 2y).
• Update min SDK version required to 3.7.0
• Validate password limit to 72 characters
• Validate UTF-8 encode

1.1.3

• Update readme.

1.1.2

• Update readme version dependencies.

1.1.1

• Update README.

1.1.0

• Fix check password.
• Fix hash password.

1.0.0

• Initial version.