Bump github.com/gdamore/tcell/v2 from 2.2.0 to 2.2.1

Bumps [github.com/gdamore/tcell/v2](https://github.com/gdamore/tcell) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/gdamore/tcell/releases)
- [Changelog](https://github.com/gdamore/tcell/blob/master/CHANGESv2.adoc)
- [Commits](gdamore/tcell@v2.2.0...v2.2.1)

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

go.mod

@@ -3,7 +3,7 @@ module github.com/mum4k/termdash
 go 1.14
 
 require (
-	github.com/gdamore/tcell/v2 v2.2.0
+	github.com/gdamore/tcell/v2 v2.2.1
 	github.com/kylelemons/godebug v1.1.0
 	github.com/mattn/go-runewidth v0.0.12
 	github.com/nsf/termbox-go v0.0.0-20201107200903-9b52a5faed9e

go.sum

@@ -1,7 +1,7 @@
 github.com/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
 github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
-github.com/gdamore/tcell/v2 v2.2.0 h1:vSyEgKwraXPSOkvCk7IwOSyX+Pv3V2cV9CikJMXg4U4=
-github.com/gdamore/tcell/v2 v2.2.0/go.mod h1:cTTuF84Dlj/RqmaCIV5p4w8uG1zWdk0SF6oBpwHp4fU=
+github.com/gdamore/tcell/v2 v2.2.1 h1:Gt8wk0jd5pIK2CyXNo/fqwxNWf726j1lQjEDdfbnqTc=
+github.com/gdamore/tcell/v2 v2.2.1/go.mod h1:cTTuF84Dlj/RqmaCIV5p4w8uG1zWdk0SF6oBpwHp4fU=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=