Bump to 1.2.0.

Cargo.toml

 [package]
 name = "termion"
-version = "1.1.4"
-authors = ["ticki <Ticki@users.noreply.github.com>", "gycos <alexandre.bury@gmail.com>"]
+version = "1.2.0"
+authors = ["ticki <Ticki@users.noreply.github.com>", "gycos <alexandre.bury@gmail.com>", "IGI-111 <igi-111@protonmail.com>"]
 description = "A bindless library for manipulating terminals."
 repository = "https://github.com/ticki/termion"
 documentation = "https://docs.rs/termion"