v2.2

• Fixed cross-platform bugs: #54, #56, #57.
• Now command speed can be used to check current speed. (#58)
• Rewrote some code with std::optional and override; Therefore fixed #59 and added better tips when command export cannot find a line.
• Now errors in files has message to show where they are. (#60)
• Now command export can combine consecutive lines in the same type together. (#61)
• Added command export-all to export with data in lines. (#62)
• Now commands check if blocks are linked to lines with correct types. (#63)
• Now command set and input don't require spaces between digits of wide value. (#64)

Note: You need to download help.txt & lang.json and put it into the same directory of the interpreter, no matter whether you are using Windows or Linux version.