mdcat-0.12.0

Added

• Add TerminalCapability struct as replacement for mdcat::Terminal trait to
  remove dynamic dispatch and allow for more accurate and less complicated
  conditional compilation of terminal support for different platforms (see
  GH-45).
• Move to Rust 2018, and raise minimum supported Rust version to 1.31 (see
  GH-46).

Changed

• Drop support for Rust 1.29 and older.
• Do not test specific Rust on versions on Travis CI any longer; Rust stable
  becomes the lowest supported Rust version.

Removed

• mdcat::Terminal trait and implementations (see GH-45).

Fixed

• Set hostname to local hostname for inline links to file:// URLs, which
  should properly resolve file:// URLs over SSH (see OSC 8 file URLs,
  GH-42 and GH-44).