Bump Dependencies

[github-actions]

> ungit@1.5.15 bumpdependencies /home/runner/work/ungit/ungit
> ncu --upgrade --reject bootstrap

Upgrading /home/runner/work/ungit/ungit/package.json

 @primer/octicons        ~11.2.0  →  ~12.0.0     
 diff2html               ~3.1.18  →   ~3.2.0     
 open                     ~7.3.0  →   ~7.4.0     
 socket.io                ~3.0.4  →   ~3.1.1     
 archiver                 ~5.1.0  →   ~5.2.0     
 electron                ~11.1.1  →  ~11.2.3     
 eslint                  ~7.16.0  →  ~7.19.0     
 eslint-config-prettier   ~7.1.0  →   ~7.2.0     
 eslint-plugin-prettier   ~3.3.0  →   ~3.3.1     
 less                     ~4.0.0  →   ~4.1.1     
 nodemon                  ~2.0.6  →   ~2.0.7     
 npm-check-updates       ~10.2.5  →  ~11.1.1     
 puppeteer                ~5.5.0  →   ~7.0.4     
 supertest                ~6.0.1  →   ~6.1.3     

Run npm install to install new versions.