Fix buildMigrationNamespaceResolver to use isValidSuffix(...) instead of hard-coded check

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@extollo/lib",
-  "version": "0.10.3",
+  "version": "0.10.4",
   "description": "The framework library that lifts up your code.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",

src/orm/services/Migrations.ts

@@ -67,7 +67,7 @@ export class Migrations extends CanonicalInstantiable<Migration> {
         const namespace: {[key: string]: Migration} = {}
 
         for await ( const entry of basePath.walk() ) {
-            if ( !entry.endsWith(this.suffix) ) {
+            if ( !this.isValidSuffix(entry) ) {
                 this.logging.debug(`buildMigrationNamespaceResolver - Skipping file with invalid suffix: ${entry}`)
                 continue
             }