Fix node-pg-migrate, add #noTransaction() method.

types/node-pg-migrate/index.d.ts

@@ -66,6 +66,8 @@ export interface MigrationBuilder {
 
     sql(sql: string, args?: object): void;
     func(sql: string): PgLiteral;
+
+    noTransaction(): void;
 }
 
 export default function(options: any): Promise<void>;

types/node-pg-migrate/node-pg-migrate-tests.ts

@@ -58,3 +58,5 @@ pgm.addColumn({ schema: 'schema', name: 'table' }, {
         onUpdate: '',
     }
 });
+
+pgm.noTransaction();