(GH-530) Enable extension on workspace load

This commit updates the `activationEvents` array to activate the
extension if there are any Puppet manifests or module metadata.json
files present. This results in the extensions starting when a folder
containing Puppet code is opened, not only after Puppet code is opened.
This is a better user experience, as it enables the features a user
would want to use without having to have them know to open a Puppet file
first.

Author: jpogran

CHANGELOG.md

@@ -6,6 +6,10 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 
 ## [Unreleased]
 
+### Changed
+
+- ([GH-530](https://github.com/lingua-pupuli/puppet-vscode/issues/530)) Enable extension with Puppet workspace files
+
 ## [0.18.1] - 2019-06-07
 
 ### Added

package.json

@@ -53,6 +53,9 @@
   "activationEvents": [
     "onLanguage:puppet",
     "onLanguage:puppetfile",
+    "workspaceContains:**/*.pp",
+    "workspaceContains:**/*.epp",
+    "workspaceContains:**/Puppetfile",
     "onCommand:extension.puppetShowConnectionLogs",
     "onCommand:extension.puppetShowConnectionMenu",
     "onCommand:extension.puppetLint",