bump fyne.io/fyne/v2 from 2.1.4 to 2.3.1

use go install instead of go get

Merge pull request #19 from mikan/17-minor-improvements

Minor improvements for log pane

Merge pull request #16 from mikan/15-auto-select-nw-adapters-for-ip2mac

Auto select network adapters for ip2mac

Merge pull request #11 from mikan/10-fix-mojibake-in-windows

Set FYNE_FONT environment variable in Japanese Windows environment

Merge pull request #9 from mikan/8-fix-cross-compile-error

#8 Fix cross compile error

#7 hide console window while executing ping and arp

Merge pull request #6 from mikan/5-use-ip-cmd

#5 Use ip command instead arp command if it available

Merge pull request #4 from mikan/3-ignore-broadcast-ping-error

#3 Ignore broadcast timeout error when resolving IP address from MAC address

fix README.md for #2