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

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

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

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

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/icza/backscanner v0.0.0-20180226082541-a77511ef4f0f
 	github.com/icza/mighty v0.0.0-20180919140131-cfd07d671de6 // indirect
 	github.com/jmoiron/sqlx v1.3.5
-	github.com/mattn/go-isatty v0.0.19
+	github.com/mattn/go-isatty v0.0.20
 	github.com/pierrec/lz4/v3 v3.3.5
 	github.com/tailscale/hujson v0.0.0-20190930033718-5098e564d9b3
 	github.com/ulikunitz/xz v0.5.11

go.sum

@@ -100,8 +100,8 @@ github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/lib/pq v1.2.0 h1:LXpIM/LZ5xGFhOpXAQUIMM1HdyqzVYM13zNdjCEEcA0=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
-github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
-github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+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-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
 github.com/mattn/go-sqlite3 v1.14.16 h1:yOQRA0RpS5PFz/oikGwBEqvAWhWg5ufRz4ETLjwpU1Y=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=