feat(ghsa): add pub ecosystem (#186)

Author: DmitriyLewen

ghsa/ghsa.go

@@ -31,7 +31,8 @@ var (
 	Go         SecurityAdvisoryEcosystem = "GO"
 	Rust       SecurityAdvisoryEcosystem = "RUST"
 	Erlang     SecurityAdvisoryEcosystem = "ERLANG"
-	Ecosystems                           = []SecurityAdvisoryEcosystem{Composer, Maven, Npm, Nuget, Pip, Rubygems, Go, Erlang, Rust}
+	Pub        SecurityAdvisoryEcosystem = "PUB"
+	Ecosystems                           = []SecurityAdvisoryEcosystem{Composer, Maven, Npm, Nuget, Pip, Rubygems, Go, Erlang, Rust, Pub}
 
 	wait = func(i int) time.Duration {
 		sleep := math.Pow(float64(i), 2) + float64(utils.RandInt()%10)