20.2.0

What's Changed

• Run CI for the msrv and latest rust version by @leighmcculloch in #1205
• Add CI job to run cargo-semver-checks by @leighmcculloch in #1202
• Remove unused CI step by @leighmcculloch in #1207
• Remove accidentally committed binaries by @leighmcculloch in #1206
• Fix bug with Timepoint/Duration as parameters/returns from functions by @leighmcculloch in #1200
• Add storage update fns by @leighmcculloch in #1209
• Export functions for creating Timepoint/Duration by @leighmcculloch in #1201
• Allow &Env in contract fns by @leighmcculloch in #1210
• Bump version to 20.2.0 by @github-actions in #1211

Full Changelog: v20.1.0...v20.2.0