Add Action to run analysis on PRs as well as normal pushes

Author: devblackops

.github/main.workflow

@@ -1,8 +1,24 @@
-workflow "PSScriptAnalyzer" {
+workflow "script-analysis" {
   resolves = ["analyze"]
   on       = "push"
 }
 
+workflow "pr-script-analysis" {
+  on       = "pull_request"
+  resolves = "analyze-pr"
+}
+
+action "filter-to-pr-open-synced" {
+  uses = "actions/bin/filter@master"
+  args = "action 'opened|synchronize'"
+}
+
+action "analyze-pr" {
+  uses    = "./analyze"
+  needs   = "filter-to-pr-open-synced"
+  secrets = ["GITHUB_TOKEN"]
+}
+
 action "analyze" {
   uses    = "./analyze"
   secrets = ["GITHUB_TOKEN"]