Add Windows to the mix (#49)

dist/install-rebar3.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -eo pipefail
+
+cd "$RUNNER_TEMP"
+
+VSN=${1}
+FILE_INPUT=rebar3
+FILE_OUTPUT=rebar3
+DIR_FOR_BIN=.setup-beam/rebar3
+
+rm -f "${FILE_OUTPUT}"
+rm -rf "${DIR_FOR_BIN}"
+wget -q -O "${FILE_OUTPUT}" "https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}"
+mkdir -p "${DIR_FOR_BIN}/bin"
+chmod +x "${FILE_OUTPUT}"
+mv "${FILE_OUTPUT}" "${DIR_FOR_BIN}/bin"
+echo "$(pwd)/${DIR_FOR_BIN}/bin" >> "$GITHUB_PATH"
+echo "Installed rebar3 version follows"
+${DIR_FOR_BIN}/bin/rebar3 version