[master] Auto-update dependencies (#1254)

Produced via:
  `./hack/update-deps.sh --upgrade && ./hack/update-codegen.sh`
/assign n3wscott vagababov
/cc n3wscott vagababov

Gopkg.lock

@@ -1485,14 +1485,14 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:4d8d06fc8e0f7dbfad243aa377651234d422d523c2a3297366343b9ff5165922"
+  digest = "1:31bd9c0a200618a3325145139d59d17726c7ffaa2ae4d88480de3ee5137714bb"
   name = "knative.dev/test-infra"
   packages = [
     "scripts",
     "tools/dep-collector",
   ]
   pruneopts = "UT"
-  revision = "e6e89d29e93a3f4dba44c4a694d704e3e8921c64"
+  revision = "bf3e6802597ac31776a8e3e62b32d51744b2ae77"
 
 [[projects]]
   digest = "1:8730e0150dfb2b7e173890c8b9868e7a273082ef8e39f4940e3506a481cf895c"

vendor/knative.dev/test-infra/scripts/library.sh

@@ -479,22 +479,20 @@ function start_latest_knative_eventing() {
 #             $3..$n - parameters passed to the tool.
 function run_go_tool() {
   local tool=$2
-  if [[ -z "$(which ${tool})" ]]; then
-    local action=get
-    [[ $1 =~ ^[\./].* ]] && action=install
-    # Avoid running `go get` from root dir of the repository, as it can change go.sum and go.mod files.
-    # See discussions in https://github.com/golang/go/issues/27643.
-    if [[ ${action} == "get" && $(pwd) == "${REPO_ROOT_DIR}" ]]; then
-      local temp_dir="$(mktemp -d)"
-      local install_failed=0
-      # Swallow the output as we are returning the stdout in the end.
-      pushd "${temp_dir}" > /dev/null 2>&1
-      GOFLAGS="" go ${action} $1 || install_failed=1
-      popd > /dev/null 2>&1
-      (( install_failed )) && return ${install_failed}
-    else
-      GOFLAGS="" go ${action} $1
-    fi
+  local action=get
+  [[ $1 =~ ^[\./].* ]] && action=install
+  # Avoid running `go get` from root dir of the repository, as it can change go.sum and go.mod files.
+  # See discussions in https://github.com/golang/go/issues/27643.
+  if [[ ${action} == "get" && $(pwd) == "${REPO_ROOT_DIR}" ]]; then
+    local temp_dir="$(mktemp -d)"
+    local install_failed=0
+    # Swallow the output as we are returning the stdout in the end.
+    pushd "${temp_dir}" > /dev/null 2>&1
+    GOFLAGS="" go ${action} $1 || install_failed=1
+    popd > /dev/null 2>&1
+    (( install_failed )) && return ${install_failed}
+  else
+    GOFLAGS="" go ${action} $1
   fi
   shift 2
   ${tool} "$@"