Add contains method to filter

Author: AJCStriker

package.json

@@ -1,6 +1,6 @@
 {
   "name": "strontium",
-  "version": "2.7.10",
+  "version": "2.7.11",
   "description": "Strontium is a TypeScript toolkit for High Performance API servers built for Production not Projects.",
   "main": "lib/src/index.js",
   "types": "lib/src/index.d.ts",

src/query/abstract/Filter.ts

@@ -11,6 +11,7 @@ export type FieldFilter<P extends keyof T, T> =
           $gte?: T[P]
           $lt?: T[P]
           $lte?: T[P]
+          $contains?: T[P]
       }
     | T[P]
 

src/query/drivers/sql/SQLFilterCompiler.ts

@@ -78,6 +78,8 @@ export const compileSQLFilter: FilterCompiler<[string, Array<any>]> = (
             queries.push(["?? < ?", [field, subquery.$lt]])
         } else if (subquery.$lte !== undefined) {
             queries.push(["?? <= ?", [field, subquery.$lte]])
+        } else if (subquery.$contains !== undefined) {
+            queries.push(["?? LIKE ?", [field, `%${subquery.$contains}%`]])
         } else if (subquery.$eq !== undefined) {
             queries.push(["?? = ?", [field, subquery.$eq]])
         } else {