Update to the `2.0.0` framework/tooling

[uint]

Some of these are blocked by CosmWasm/cw-multi-test#128

• cw1
  • [x] package
  • [x] subkeys
  • [ ] whitelist
• cw20
  • [x] package
  • [ ] base
  • [x] ics20
• cw3
  • [x] package
  • [ ] fixed
  • [ ] flex
• cw4
  • [x] package
  • [x] group
  • [x] stake

[uint]

Closing in favor of #900, #901, #902