Remove Partial<> wrapper from transformMap

Author: nene

src/syntax/transformMap.ts

@@ -51,7 +51,7 @@ import { mysqlMap } from "./dialects/mysql";
 import { sqliteMap } from "./dialects/sqlite";
 import { postgresqlMap } from "./dialects/postgresql";
 
-export const transformMap: Partial<CstToDocMap<Node>> = {
+export const transformMap: CstToDocMap<Node> = {
   ...aliasMap,
   ...alterActionMap,
   ...alterTableMap,