test: improving crypto fips

- using strictEqual instead equal
- cast `response` to Number()

PR-URL: https://github.com/nodejs/node/pull/10002
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>

test/parallel/test-crypto-fips.js

@@ -53,7 +53,7 @@ function testHelper(stream, args, expectedOutput, cmd, env) {
       assert.notEqual(-1, response.indexOf(expectedOutput));
     } else {
       // Normal path where we expect either FIPS enabled or disabled.
-      assert.equal(expectedOutput, response);
+      assert.strictEqual(expectedOutput, Number(response));
     }
     childOk(child);
   }