chore: bumps the Cargo.toml version to 3.0.0-alpha1 to reduce confusion
[package]
name = "clap"
-version = "2.29.2"
+version = "3.0.0-alpha1"
authors = ["Kevin K. <kbknapp@gmail.com>"]
exclude = ["examples/*", "clap-test/*", "tests/*", "benches/*", "*.png", "clap-perf/*", "*.dot"]
repository = "https://github.com/kbknapp/clap-rs"
