Update for OR-3.4 - rebar3 -> 3.21

Author: martinsumner

.github/workflows/erlang.yml

@@ -3,10 +3,10 @@ name: Erlang CI
 on:
   push:
     branches:
-      - openriak-3.2
+      - openriak-3.4
   pull_request:
     branches:
-      - openriak-3.2
+      - openriak-3.4
 
 jobs:
 

README.md

@@ -6,7 +6,7 @@ __Authors:__ Ulf Wiger ([`ulf@wiger.net`](mailto:ulf@wiger.net)).
 
 Generic setup utility for Erlang-based systems
 
-![Setup OpenRiak Status](https://github.com/OpenRiak/setup/actions/workflows/erlang.yml/badge.svg?branch=openriak-3.2)
+![Setup OpenRiak Status](https://github.com/OpenRiak/setup/actions/workflows/erlang.yml/badge.svg?branch=openriak-3.4)
 
 ## Introduction ##
 

rebar.config

@@ -1,5 +1,5 @@
 %% -*- mode: erlang; erlang-indent-level: 4; indent-tabs-mode: nil -*-
-{minimum_otp_vsn, "22.0"}.
+{minimum_otp_vsn, "24.0"}.
 {erl_opts, [debug_info]}.
 {xref_checks, [
     undefined_function_calls,