Log Message:
texlab: update to 3.3.1.

## [3.3.1] - 10.11.2021

### Fixed

- Fix completion for symbols in commands with incomplete braces
- Do not produce syntax errors for macro parameters inside special command arguments
- Fix a bug that sometimes causes the `aux` file to pick up the diagnostics of \ 
the `tex` file
- Fix a bug that sometimes prevents `log` files from being reanalyzed