build(deps): bump github.com/mattn/go-runewidth from 0.0.19 to 0.0.20 (#14942)

Bumps [github.com/mattn/go-runewidth](https://github.com/mattn/go-runewidth) from 0.0.19 to 0.0.20.
- [Commits](mattn/go-runewidth@v0.0.19...v0.0.20)

---
updated-dependencies:
- dependency-name: github.com/mattn/go-runewidth
  dependency-version: 0.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/julienschmidt/httprouter v1.3.0
 	github.com/linkerd/linkerd2-proxy-api v0.18.0
 	github.com/mattn/go-isatty v0.0.20
-	github.com/mattn/go-runewidth v0.0.19
+	github.com/mattn/go-runewidth v0.0.20
 	github.com/nsf/termbox-go v1.1.1
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pkg/browser v0.0.0-20170505125900-c90ca0c84f15

go.sum

@@ -297,8 +297,8 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-runewidth v0.0.19 h1:v++JhqYnZuu5jSKrk9RbgF5v4CGUjqRfBm05byFGLdw=
-github.com/mattn/go-runewidth v0.0.19/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
+github.com/mattn/go-runewidth v0.0.20 h1:WcT52H91ZUAwy8+HUkdM3THM6gXqXuLJi9O3rjcQQaQ=
+github.com/mattn/go-runewidth v0.0.20/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
 github.com/miekg/dns v1.1.57 h1:Jzi7ApEIzwEPLHWRcafCN9LZSBbqQpxjt/wpgvg7wcM=
 github.com/miekg/dns v1.1.57/go.mod h1:uqRjCRUuEAA6qsOiJvDd+CFo/vW+y5WR6SNmHE55hZk=
 github.com/mitchellh/copystructure v1.2.0 h1:vpKXTN4ewci03Vljg/q9QvCGUDttBOGBIa15WveJJGw=