updated history

HISTORY.md

@@ -19,6 +19,7 @@
     * added "neg" selector to monadic function reporter in "Operators" category
     * enhanced support for embedding Snap in other website, thanks, Bernat!
     * export sounds
+    * new "microphone" sensor block in audioComp lib with live volume / signals / frequencies 
 * Notable Changes:
     * added third hsv dimension to pen colors, changed SET and CHANGE pen blocks
     * added transparency (alpha) to pen colors
@@ -48,6 +49,7 @@
 
 ### 2019-03-05
 * GUI: added "globe" icon to language menu item
+* AudioComp lib: added @mjguzdial style live signal and fft support
 
 ### 2019-03-04
 * GUI: deprecated storing projects in localStorage