0.2.1

Changes

• display version once at start

MakeCode project which include this extension.
mbit-more-v2-0_2_1 https://makecode.microbit.org/_TswUV5bu1b2a
(compiled code 'microbit-mbit-more-v2-0_2_1.hex' is in assets)

Local compiled binary 'microbit-mbit-more-v2-0_2_1-a.hex' in assets does not stop.