Remove travis and replace badge with GH actions

.travis.yml

@@ -1,8 +0,0 @@
-language: erlang
-script: "make test"
-otp_release:
-  - 23.0
-  - 22.3
-  - 21.3
-  - 20.3
-before_script: "sudo apt-get --yes --force-yes install libpam-runtime python-software-properties software-properties-common"

Makefile

@@ -22,8 +22,6 @@ test:
 dialyzer: compile
 	DIALYZER=1 $(REBAR) dialyzer
 
-travis: test dialyzer
-
 dev:
 	mkdir -p _checkouts
 	cd _checkouts; git clone https://github.com/choptastic/qdate_localtime

README.md

@@ -1,6 +1,6 @@
 # qdate - Erlang Date and Timezone Library
 
-[![Build Status](https://travis-ci.org/choptastic/qdate.png?branch=master)](https://travis-ci.org/choptastic/qdate)
+[![qdate tests and dialyzer](https://github.com/choptastic/qdate/actions/workflows/tests-workflow.yml/badge.svg)](https://github.com/choptastic/qdate/actions/workflows/tests-workflow.yml)
 
 ## Purpose