Add GH Action

Author: devblackops

.github/main.workflow

@@ -0,0 +1,19 @@
+workflow "psake" {
+  resolves = "test"
+  on       = "push"
+}
+
+workflow "psscriptanalysis" {
+  on       = "pull_request"
+  resolves = "analyze"
+}
+
+action "test" {
+  uses = "devblackops/psake-github-action@master"
+  args = "test"
+}
+
+action "analyze" {
+  uses    = "devblackops/github-action-psscriptanalyzer@master"
+  secrets = ["GITHUB_TOKEN"]
+}