chore(deps): bump github.com/projectdiscovery/goflags

Bumps [github.com/projectdiscovery/goflags](https://github.com/projectdiscovery/goflags) from 0.1.20 to 0.1.21.
- [Release notes](https://github.com/projectdiscovery/goflags/releases)
- [Commits](projectdiscovery/goflags@v0.1.20...v0.1.21)

---
updated-dependencies:
- dependency-name: github.com/projectdiscovery/goflags
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/miekg/dns v1.1.55
 	github.com/pkg/errors v0.9.1
 	github.com/projectdiscovery/asnmap v1.0.4
-	github.com/projectdiscovery/goflags v0.1.20
+	github.com/projectdiscovery/goflags v0.1.21
 	github.com/projectdiscovery/gologger v1.1.11
 	github.com/projectdiscovery/retryabledns v1.0.35
 	github.com/projectdiscovery/retryablehttp-go v1.0.28

go.sum

@@ -184,8 +184,8 @@ github.com/projectdiscovery/blackrock v0.0.1 h1:lHQqhaaEFjgf5WkuItbpeCZv2DUIE45k
 github.com/projectdiscovery/blackrock v0.0.1/go.mod h1:ANUtjDfaVrqB453bzToU+YB4cUbvBRpLvEwoWIwlTss=
 github.com/projectdiscovery/fastdialer v0.0.37 h1:GEn0VYD/Q+KWiUlQDPP5stvIauN8+gE/eooPzrwidic=
 github.com/projectdiscovery/fastdialer v0.0.37/go.mod h1:e4Rg9mQ5mNCDFV37njgGCognM0PdLq5f8CcljBqTkRw=
-github.com/projectdiscovery/goflags v0.1.20 h1:38JgrMOJWg+7G3GUvZJ5cpblBsOFgftNihFusv57A+4=
-github.com/projectdiscovery/goflags v0.1.20/go.mod h1:HlJeOmWiMRmjg7PnOMiQkwgLMs88DKgymV1motcxFZw=
+github.com/projectdiscovery/goflags v0.1.21 h1:g/uoeoNse9LWlO7Gw4cPdnOkrnwPZJJT5tdGb51UpV4=
+github.com/projectdiscovery/goflags v0.1.21/go.mod h1:aN2oqZTmqVCblFLd03G8URYOT3/BqYf1QAWXL6ZpuMM=
 github.com/projectdiscovery/gologger v1.1.11 h1:8vsz9oJlDT9euw6xlj7F7dZ6RWItVIqVwn4Mr6uzky8=
 github.com/projectdiscovery/gologger v1.1.11/go.mod h1:UR2bgXl7zraOxYGnUwuO917hifWrwMJ0feKnVqMQkzY=
 github.com/projectdiscovery/hmap v0.0.19 h1:v6a2en6INbS9mGRSUXOyxKa89VstnAtmk5lpJqOWPfo=