fix: nil parameters with named placeholders

- Fixes the remaining edge-case bug with passing nil parameters

src/parser.js

@@ -1,4 +1,7 @@
 import { FormatError } from './errors';
+import * as createCompiler from 'named-placeholders';
+
+const convertNamedPlaceholders = createCompiler();
 
 const parseTypes = (field, next) => {
   //https://github.com/GHMatti/ghmattimysql/blob/37f1d2ae5c53f91782d168fe81fba80512d3c46d/packages/ghmattimysql/src/server/utility/typeCast.ts#L3
@@ -27,7 +30,16 @@ const parseParameters = (query, parameters) => {
 
   if (typeof parameters === 'function') return [query, []];
 
-  if (query.includes('@') || query.includes(':')) return [query, parameters];
+  if (query.includes('@') || query.includes(':')) {
+    const obj = parameters.length !== 0 ? parameters : (() => {
+      let obj = {};
+      const [_, paramName] = convertNamedPlaceholders.parse(query);
+      for (let i = 0; i < paramName.length; i++) obj[paramName[i]] = null;
+      return obj;
+    })();
+
+    return [query, obj]
+  };
 
   const queryParams = query.match(/\?(?!\?)/g);