Refactor search param handling to work with old Node versions

src/lib/transpile-decl.js

@@ -47,7 +47,7 @@ export default function transpileDecl(result, promises, decl, opts, cache) { //
 
 			// <url> param()s
 			const params = {
-				...Object.fromEntries(url.searchParams),
+				...paramsFromSearchParams(url.searchParams),
 				...paramsFromNodes(
 					node.nodes.slice(2, -1)
 				)
@@ -143,6 +143,20 @@ function paramsFromNodes(nodes) {
 	return params;
 }
 
+// params from URL search params
+function paramsFromSearchParams(searchParams) {
+	// valid params as an object
+	const params = {};
+
+	// for each search param
+	searchParams.forEach((value, key) => {
+		params[key] = value;
+	});
+
+	// return valid params as an object
+	return params;
+}
+
 // whether the node is a filled param()
 function isFilledParam(node) {
 	return node.type === 'func' && node.value === 'param' && node.nodes.length === 4 && node.nodes[1].type === 'word';