bump ABCI version to 0.16.2 due to ResponseCommit.retain_height

See #4588 for original change.

I believe this is appropriate. Anything else that needs to be updated?

______

For contributor use:

- [ ] ~Wrote tests~
- [x] Updated CHANGELOG_PENDING.md
- [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] ~Updated relevant documentation (`docs/`) and code comments~
- [x] Re-reviewed `Files changed` in the Github PR explorer

CHANGELOG_PENDING.md

@@ -24,7 +24,7 @@ Friendly reminder, we have a [bug bounty program](https://hackerone.com/tendermi
 
 ### FEATURES:
 
-- [abci] Add `ResponseCommit.retain_height` field, which will automatically remove blocks below this height.
+- [abci] Add `ResponseCommit.retain_height` field, which will automatically remove blocks below this height. This bumps the ABCI version to 0.16.2.
 - [rpc] Add `/status` response fields for the earliest block available on the node
 - [rpc] [\#4611](https://github.com/tendermint/tendermint/pull/4611) Add `codespace` to `ResultBroadcastTx` (@whylee259)
 - [cmd] [\#4665](https://github.com/tendermint/tendermint/pull/4665) New `tedermint completion` command to generate Bash/Zsh completion scripts (@alessio).

version/version.go

@@ -23,7 +23,7 @@ const (
 	TMCoreSemVer = "0.33.3"
 
 	// ABCISemVer is the semantic version of the ABCI library
-	ABCISemVer  = "0.16.1"
+	ABCISemVer  = "0.16.2"
 	ABCIVersion = ABCISemVer
 )