fix: Add required_providers to modules (#39)

Author: jamesholland-uk

configuration/modules/networking/versions.tf

@@ -0,0 +1,8 @@
+terraform {
+  required_providers {
+    panos = {
+      source = "paloaltonetworks/panos"
+    }
+  }
+  required_version = ">= 0.12"
+}

configuration/modules/policies/versions.tf

@@ -0,0 +1,8 @@
+terraform {
+  required_providers {
+    panos = {
+      source = "paloaltonetworks/panos"
+    }
+  }
+  required_version = ">= 0.12"
+}