Bump version to 0.2.0

Bump the crate version to 0.2.0 in preparation for a release to
Crates.io.

I don't think the code really deserves such a release at this point,
but I may not have time to work on it for a long while, and it's much
better than what I have on Crates.io now.

Author: 8573

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "irc-bot"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["c74d <[email protected]>"]
 description = "A library for writing Internet Relay Chat (IRC) bots in Rust"
 documentation = "https://docs.rs/irc-bot"