Improve hack/get_release_info.sh
Adopt bash strict mode
Avoid cd errors as seen on CI vendor jobs:
hack/get_release_info.sh: line 9: cd: /go/src/github.com/containers/libpod: No such file or directory
# a script allows uniform behavior across multiple environments and
# distributions. The script expects a single argument, as reflected below.
-set -e
+set -euo pipefail
-cd "${GOSRC:-$(dirname $0)/../}"
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+cd "${GOSRC:-${DIR}/../}"
valid_args() {
REGEX='^\s+[[:upper:]]+\*[)]'
