Merge 3.4 master into solc-0.8 (#2499)

* 3.4.0-rc.0

* Allow manual dispatch of Test CI job

* Update lockfile (#2481)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

* Add "available since" comments in documentation

* Add "available since" comments in documentation

(cherry picked from commit 63a0343dda)

* Remove SafeMathMock compilation warnings (#2497)

* Remove SafeMathMock compilation warnings (#2497)

(cherry picked from commit f4e57fd529)

* 3.4.0

* fix safemath test to use renamed function from the mock

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Renovate Bot <bot@renovateapp.com>

contracts/drafts/EIP712.sol

@@ -18,6 +18,8 @@ pragma solidity ^0.8.0;
  *
  * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
  * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
+ *
+ * _Available since v3.4._
  */
 abstract contract EIP712 {
     /* solhint-disable var-name-mixedcase */