(Gsoc'21)🔨 corrected some minor mistakes in tests

Author: satyasaibhushan

test/tests/p5.Metro.js

@@ -45,7 +45,7 @@ describe('p5.Metro', function () {
       metro.stop(0.2);
       expect(ticks).to.not.equal(0);
       setTimeout(() => {
-        expect(metro.metroTicks).to.not.equal(ticks);
+        expect(metro.metroTicks).to.be.above(ticks);
       }, 100);
       setTimeout(() => {
         ticks = metro.metroTicks;

test/tests/p5.Pulse.js

@@ -45,7 +45,7 @@ describe('p5.Pulse', function () {
       }, 500);
       expect(pulse.started).to.be.true;
       expect(pulse.osc2.started).to.be.true;
-      pulse.stop(221, 0.1);
+      pulse.stop();
       expect(pulse.started).to.be.false;
       expect(pulse.osc2.started).to.be.false;
     });