upgrade to latest dependencies (knative-extensions#211)

bumping knative.dev/client 9b838cf...5030b5d:
  > 5030b5d updates kn versions for presubmit integration test (# 1577)
  > 2d9f957 upgrade to latest dependencies (# 1578)
  > 958bd51 Update changelog for 1.2 release (# 1576)
  > ddbae2e Fix for file not found error message discrepancy in windows (# 1575)
  > 29fff9a Update cli-runtime to matching k8s (# 1574)
  > ed096b9 upgrade to latest dependencies (# 1573)
  > 17d6184 upgrade to latest dependencies (# 1571)
  > fc85cff Remove k8s cluster version pin (# 1572)

Signed-off-by: Knative Automation <[email protected]>

Author: knative-automation

go.mod

@@ -5,7 +5,7 @@ go 1.15
 require (
 	github.com/spf13/cobra v1.3.0
 	gotest.tools/v3 v3.0.3
-	knative.dev/client v0.28.1-0.20220119125353-9b838cfb0a83
+	knative.dev/client v0.29.0
 	knative.dev/hack v0.0.0-20220118141833-9b2ed8471e30
 
 )