[Bug Report] Command + C on Mac deletes cell data instead of copying it

### I am opening an issue for
vue-easytable

### Issue Type
Bug

### Issue Title
Command C on Mac deletes cell data instead of copying it

### library Version
v2.26.0

### Vue Type
vue 2.6.14

### Browser Type
Firefox 112.0.1

### System version
Mac OSX 12.0.1

### Reproduction url
https://codesandbox.io/s/3kk28x

### Step to reproduce
1) Select a cell
2) Use the Mac key command for "copy" (Command C)

### What is expected?
I expect the data in the cell to stay the same, and that the data is now stored in my clipboard in OSX.

### What is actually happening?
The data is not copied to my clipboard and it disappears from the cell.