Prerelease 0.2.0

[facchinm]

• Add BLE capability
• Fix HID reboot tool on WIndows
• Add capability to trigger ESP32 bootloader mode from RA4

@pennam

[pennam]

@facchinm i've pushed the changes for the hid package here: https://github.com/bcmi-labs/hid/tree/unor4-win

we can either switch the go package path and remove the git submodule or update the submodule and add

replace github.com/karalabe/hid v1.0.1-0.20190806082151-9c14560f9ee8 => ./hid

in unor4wifi-reboot go.mod file