System
* Force a line break before first arg for blocks with >=5 args (e.g. set NeoPixels)
* Decrease serial delay when running on Mac OS to speed up graphing
* New Examples: ClapCounter, RadioJingleBells, SoundLevel, TempoMeter, ThreePartHaromony,

Libraries
* String: make "join with separator" accept a single string (as well as a list of strings)
* Microphone: add clap counter
* Microphone: allow time for v2 microphone to settle when it is turned on
* RingTone: allow mixed-case note names and misplaced dots in dotted notes
* RingTone: accept _ as flat and accept all sharps and flats including e#, b#, c_, and f_
* RingTone: allow newlines in "play ringtone" block
* Tone: Use lists in pitch conversion; accept _ for flats
* New Pluck library (requires a board with DAC or fast PWM)
* New MultiTone library (requires a board with DAC or fast PWM)

VM
* Set pin LOW before switching to input in turnOffPins()
* Stop PWM when nrf52 boards are reset
* Increase brightness of micro:bit V2 display (slightly) by using high drive

Bug Fixes
* Fix: Incorrect colors on Clue TFT
* Fix: Script copy/paste error when scripts include blocks with no arguments
* Fix: Graph data should be cleared when new project is loaded
* Fix: When a command block definition is changed, blocks following calls to that command disappear