ink! v3.0.1 release

Release ink! 3.0.0 (use-ink#1160)

* Bump version

* Add release notes

* Update readme

* Update release notes

* Update release notes

* Update release notes to reflect stabilized `seal_delegate_call`

Release ink! 3.0.0-rc9 (use-ink#1135)

* Bump crate versions to `3.0.0-rc9`

* Improve documentation of `ink_storage::Mapping`

* Hide `Memory`

* Update release notes

* Remove `Memory`

* Remove `Memory`

* Fix doc test

* Add `Changed` section to release notes

* Update release notes

* Update release notes

Release ink! 3.0.0-rc8 (use-ink#1105)

* Bump rc7 to rc8

* Update changelog

* Apply suggestions from code review

Co-authored-by: GreenBaneling | Supercolony <[email protected]>

* Fix `polkadot-js/api` links + mention PR use-ink#1100

* `s/polkadots/polkadot/g`

* Fix typo: contract ➜ contracts

Co-authored-by: GreenBaneling | Supercolony <[email protected]>
Co-authored-by: Hernando Castano <[email protected]>

Release ink! 3.0.0-rc7 (use-ink#1043)

* Bump `3.0.0-rc6` ➔ `3.0.0-rc7`

* Update release notes

* Update release notes

* Remove outdated changelog note

Limit `ink_eth_compatibility` crate keywords to five (use-ink#966)

Otherwise crates.io refrains from publishing:

	invalid upload request: invalid length 6, expected at most 5 keywords per crate

Release ink! 3.0.0-rc5 (use-ink#909)

* Bump version to rc5

* Add release notes

Release ink! 3.0.0-rc4 (use-ink#864)

* Add `Fixed` entry for use-ink#842

* Replace `3.0.0-rc3` with `3.0.0-rc4`

* Add bump allocator to release notes

ink! 3.0.0-rc3 release

ink! 3.0.0-rc2 release