fix(cursor): fix terminal cursor move display

[mritd]

fix the problem of moving the cursor display when the terminal inputs non-English characters (such as Chinese, Japanese)

refs #126

Signed-off-by: mritd mritd1234@gmail.com

[mritd]

I fixed the cursor display problem using the https://github.com/mattn/go-runewidth library,
but I don't know how to write a complete test case to test it...

I did a lot of testing locally, now it looks good work 😂

[AlecAivazis]

Thanks for submitting this @mritd!

I tried using 👫as an input and got some weird behaviors if I moved around and tried to delete it. I haven't yet taken the time to investigate if this is a problem with the go-runewidth or something in here but I thought I would raise it to you.

[mritd]

@AlecAivazis Have you encountered a problem with the cursor suddenly appearing on the next line?

[mritd]

I found in the test: When pressing the left arrow (move button) and the delete button at the same time, there is a certain probability that the cursor will suddenly appear on the next line.

I was testing the master branch code (not merging this PR); I guess this may be due to a location variable thread is not safe.

[AlecAivazis]

@mritd any luck hunting this down? There are a bunch of changes that have been merged recently so you probably want to open a new PR based on the current master