Use new emscripten when building with docker

script/generate-fixtures-wasm

@@ -4,6 +4,12 @@ set -e
 
 cargo build --release
 
+build_wasm_args=
+if [[ $1 == "--docker" ]]; then
+  build_wasm_args="--docker"
+  shift
+fi
+
 filter_grammar_name=$1
 
 root_dir=$PWD
@@ -20,7 +26,7 @@ while read -r grammar_file; do
   fi
 
   echo "Compiling ${grammar_name} parser to wasm"
-  "$tree_sitter" build-wasm $grammar_dir
+  "$tree_sitter" build-wasm $build_wasm_args $grammar_dir
 done <<< "$grammar_files"
 
 mv tree-sitter-*.wasm target/release/