update vendor

vendor/github.com/mattn/go-isatty/go.test.sh

@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-echo "" > coverage.txt
-
-for d in $(go list ./... | grep -v vendor); do
-    go test -race -coverprofile=profile.out -covermode=atomic "$d"
-    if [ -f profile.out ]; then
-        cat profile.out >> coverage.txt
-        rm profile.out
-    fi
-done