bring back PeakDetect (#621)

missed this in #620 !

Author: therewasaguy

lib/p5.sound.js

@@ -12257,7 +12257,9 @@ p5.MonoSynth = monosynth;
 
 p5.OnsetDetect = onsetDetect;
 
-p5.PolySynth = polysynth; 
+p5.PolySynth = polysynth;
+
+p5.PeakDetect = peakDetect; 
 
 
 p5.Signal = deprecations_Signal;

lib/p5.sound.js.map

@@ -141,6 +141,9 @@ p5.OnsetDetect = OnsetDetect;
 import PolySynth from './polysynth';
 p5.PolySynth = PolySynth;
 
+import PeakDetect from './peakDetect';
+p5.PeakDetect = PeakDetect;
+
 // Following are the deprecated classes
 import Signal from './deprecations/Signal';
 p5.Signal = Signal;