Adding ARM support for Ibotta/sopstool#46

bin/install

@@ -6,7 +6,14 @@ set -euo pipefail
 [[ -z ${ASDF_INSTALL_VERSION} ]] && echo "ASDF_INSTALL_VERSION is required" && exit 1
 [[ -z ${ASDF_INSTALL_PATH} ]] && echo "ASDF_INSTALL_PATH is required" && exit 1
 [[ ${ASDF_INSTALL_TYPE} != version ]] && echo "install type '${ASDF_INSTALL_TYPE}' is not supported." && exit 1
-[[ $(uname -m) != x86_64 ]] && echo "Sorry i386 (32bit arch) is not supported." && exit 1
+
+arch="$(uname -m)"
+# Remap names to match GitHub releases.
+[[ $arch = "aarch64" ]] && arch="arm64"
+[[ $arch = "x86_64" ]] && arch="amd64"
+
+supported_archs=("amd64" "arm64")
+[[ ! " ${supported_archs[*]} " =~ ${arch} ]] && echo "Sorry, $arch is not supported." && exit 1
 
 platform="$(uname)"
 if [[  ! (${platform} == Linux || ${platform} == Darwin) ]]; then