Cleanup for release (#91)

.github/workflows/checkall.yml

@@ -1,10 +1,6 @@
 name: Check All
 run-name: triggered by ${{ github.actor }}
 on: [push]
-  #push:
-  #  branches: [ $default-branch ]
-  #pull_request:
-  #  branches: [ $default-branch ]
 
 permissions:
   contents: read
@@ -27,4 +23,4 @@ jobs:
     - name: Test
       run: rebar3 eunit
     - name: Check
-      run: rebar3 dialyzer
+      run: rebar3 do xref, dialyzer

Makefile

@@ -1,19 +1,8 @@
-.PHONY: compile clean check-all test
+.PHONY: all clean
 
 REBAR=rebar3
 
-all: compile
-
-compile:
-	@$(REBAR) compile
-
-test:
-	@$(REBAR) eunit
-
+all:
+	@$(REBAR) do compile, eunit, dialyzer, xref
 clean:
 	@$(REBAR) clean
-
-dialyzer:
-	@$(REBAR) dialyzer
-
-check-all: test dialyzer

README.md

@@ -4,7 +4,7 @@
 
 ## Prerequisites for runtime
 
-[Erlang/OTP](http://erlang.org/), >= 17.0 Also based on
+[Erlang/OTP](http://erlang.org/), >= 22.0 Also based on
 [the new msgpack spec 0b8f5a](https://github.com/msgpack/msgpack/blob/0b8f5ac67cdd130f4d4d4fe6afb839b989fdb86a/spec.md).
 
 ## edit rebar.config to use in your application