chore: bump version to 0.12.0

Author: cakebaker

Cargo.lock

@@ -1,7 +1,7 @@
 [package]
 name = "parse_datetime"
 description = "parsing human-readable time strings and converting them to a DateTime"
-version = "0.11.0"
+version = "0.12.0"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/uutils/parse_datetime"