Bump to v3.0.0.

braincore · braincore · commit 67771d0b4181 · 2020-11-29T17:36:36.000-08:00
Publishing v2.2.0 was a mistake as it wasn't semver compatible with the
rest of v2.x. It's been yanked from cargo.
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pid"
-version = "2.2.0"
+version = "3.0.0"
 edition = "2018"
 authors = ["Ken Elkabany <ken@elkabany.com>"]
 license = "MIT"
