Restrict cddl to version 0.9.1 because of broken cli command

Author: whimboo

.gitignore

@@ -1,3 +1,4 @@
+.DS_Store
 node_modules
 /index.html
 *.cddl

scripts/test.sh

@@ -6,7 +6,9 @@ ROOT="$(dirname "$SCRIPT_DIR")"
 
 if ! [ -x "$(command -v cddl)" ] || [ "$1" = "--upgrade" ]; then
   echo 'Installing cddl'
-  cargo install cddl
+  # Remove strict version requirement once the CLI command works again
+  # See: https://github.com/anweiss/cddl/issues/213
+  cargo install cddl --version 0.9.1
 fi
 
 if [[ "$(npm list parse5)" =~ "empty" ]] || [ "$1" = "--upgrade" ]; then