Bump terminado from 0.8.2 to 0.8.3

Bumps [terminado](https://github.com/jupyter/terminado) from 0.8.2 to 0.8.3.
- [Release notes](https://github.com/jupyter/terminado/releases)
- [Changelog](https://github.com/jupyter/terminado/blob/master/doc/releasenotes.rst)
- [Commits](jupyter/terminado@0.8.2...v0.8.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

requirements.txt

@@ -76,7 +76,7 @@ singledispatch==3.4.0.3
 six==1.11.0
 smmap2==2.0.5
 snowballstemmer==1.2.1
-terminado==0.8.2
+terminado==0.8.3
 testpath==0.4.2
 tornado==5.1.1
 traitlets==4.3.2