test: refactor test-require-resolve

* var => const
* assert.equal() => assert.strictEqual()

PR-URL: https://github.com/nodejs/node/pull/10120
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-require-resolve.js

@@ -1,18 +1,18 @@
 'use strict';
-var common = require('../common');
-var fixturesDir = common.fixturesDir;
-var assert = require('assert');
-var path = require('path');
+const common = require('../common');
+const fixturesDir = common.fixturesDir;
+const assert = require('assert');
+const path = require('path');
 
-assert.equal(
+assert.strictEqual(
     path.join(__dirname, '../fixtures/a.js').toLowerCase(),
     require.resolve('../fixtures/a').toLowerCase());
-assert.equal(
+assert.strictEqual(
     path.join(fixturesDir, 'a.js').toLowerCase(),
     require.resolve(path.join(fixturesDir, 'a')).toLowerCase());
-assert.equal(
+assert.strictEqual(
     path.join(fixturesDir, 'nested-index', 'one', 'index.js').toLowerCase(),
     require.resolve('../fixtures/nested-index/one').toLowerCase());
-assert.equal('path', require.resolve('path'));
+assert.strictEqual('path', require.resolve('path'));
 
 console.log('ok');