test: strictEqual in test-beforeexit-event.js

PR-URL: https://github.com/nodejs/node/pull/10004
Reviewed-by: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

test/parallel/test-beforeexit-event.js

@@ -37,6 +37,6 @@ function tryListen() {
 }
 
 process.on('exit', function() {
-  assert.equal(4, deaths);
-  assert.equal(3, revivals);
+  assert.strictEqual(4, deaths);
+  assert.strictEqual(3, revivals);
 });