bump codegen version to 0.2.2
bump codegen version to 0.2.2

mattico/rusoto,DualSpark/rusoto,indiv0/rusoto,ford-prefect/rusoto,rusoto/rusoto,SecurityInsanity/rusoto,DualSpark/rusoto,DualSpark/rust-aws,mattico/rusoto,mthjones/rusoto,mattico/rusoto,SecurityInsanity/rusoto,mthjones/rusoto,noggleboggle/rusoto,rusoto/rusoto,rusoto/rusoto,DualSpark/rusoto,ford-prefect/rusoto,DualSpark/rust-aws,DualSpark/rust-aws,cmsd2/rusoto