Use test helpers not suite helpers.

Author: aljones15

tests/suites/algorithms-jcs.js

@@ -10,7 +10,7 @@ import {
   setupMatrix,
   setupRow
 } from '../helpers.js';
-import {isValidDatetime, isValidUtf8} from './helpers.js';
+import {isValidDatetime, isValidUtf8} from '../helpers.js';
 import chai from 'chai';
 import {endpoints} from 'vc-test-suite-implementations';