test: refactor test-crypto-certificate

assert.equal() -> assert.strictEqual()

PR-URL: https://github.com/nodejs/node/pull/9911
Reviewed-By: Prince John Wesley <princejohnwesley@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

test/parallel/test-crypto-certificate.js

@@ -19,20 +19,20 @@ var spkacPem = fs.readFileSync(common.fixturesDir + '/spkac.pem');
 
 var certificate = new crypto.Certificate();
 
-assert.equal(certificate.verifySpkac(spkacValid), true);
-assert.equal(certificate.verifySpkac(spkacFail), false);
+assert.strictEqual(certificate.verifySpkac(spkacValid), true);
+assert.strictEqual(certificate.verifySpkac(spkacFail), false);
 
-assert.equal(
+assert.strictEqual(
   stripLineEndings(certificate.exportPublicKey(spkacValid).toString('utf8')),
   stripLineEndings(spkacPem.toString('utf8'))
 );
-assert.equal(certificate.exportPublicKey(spkacFail), '');
+assert.strictEqual(certificate.exportPublicKey(spkacFail), '');
 
-assert.equal(
+assert.strictEqual(
   certificate.exportChallenge(spkacValid).toString('utf8'),
   'fb9ab814-6677-42a4-a60c-f905d1a6924d'
 );
-assert.equal(certificate.exportChallenge(spkacFail), '');
+assert.strictEqual(certificate.exportChallenge(spkacFail), '');
 
 function stripLineEndings(obj) {
   return obj.replace(/\n/g, '');