Release v5.3 cherrypick #2 (#5526)

Signed-off-by: Hadrien Croubois <hadrien.croubois@gmail.com>
Co-authored-by: Ernesto García <ernestognw@gmail.com>
Co-authored-by: Arr00 <13561405+arr00@users.noreply.github.com>
Co-authored-by: Voronor <129545215+voronor@users.noreply.github.com>
Co-authored-by: StackOverflowExcept1on <109800286+StackOverflowExcept1on@users.noreply.github.com>
Co-authored-by: Michalis Kargakis <kargakis@protonmail.com>

.changeset/blue-nails-give.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`Math`: Add `add512`, `mul512` and `mulShr`.

.changeset/fair-pumpkins-compete.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`Math`: Add saturating arithmetic operations `saturatingAdd`, `saturatingSub` and `saturatingMul`.

.changeset/fast-coats-try.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`Initializable`: Add `_initializableStorageSlot` function that returns a pointer to the storage struct. The function allows customizing with a custom storage slot with an `override`.

.changeset/fuzzy-crews-poke.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`GovernorSuperQuorum`: Add a governance extension to support a super quorum. Proposals that meet the super quorum (and have a majority of for votes) advance to the `Succeeded` state before the proposal deadline.

.changeset/good-zebras-ring.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`MerkleTree`: Add an update function that replaces a previously inserted leaf with a new value, updating the tree root along the way.

.changeset/nice-cherries-reply.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`Strings`: Add `espaceJSON` that escapes special characters in JSON strings.

.changeset/ninety-rings-suffer.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`GovernorVotesSuperQuorumFraction`: Add a variant of the `GovernorSuperQuorum` extensions where the super quorum is expressed as a fraction of the total supply.

.changeset/quiet-shrimps-kiss.md

@@ -0,0 +1,5 @@
+---
+"openzeppelin-solidity": patch
+---
+
+`MessageHashUtils`: Add `toDataWithIntendedValidatorHash(address, bytes32)`.