Detect version mismatches of `parity-scale-codec`
Created by: cmichi
Closes https://github.com/paritytech/cargo-contract/issues/232.
CI currently fails because master
fails (see https://github.com/paritytech/cargo-contract/pull/236 for the fix for that).
@Robbepop @ascjones Are you aware of any other dependencies of a contract which must be compatible with the ink! version of that dependency? scale-info
?