(maint) Update to pdk templates 2.2.0

Generated using:

    $ pdk --version
    2.2.0
    $ pdk update --template-ref 2.2.0

Author: joshcooper

.devcontainer/Dockerfile

@@ -0,0 +1,6 @@
+FROM puppet/pdk:latest
+
+# [Optional] Uncomment this section to install additional packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+

.devcontainer/devcontainer.json

@@ -0,0 +1,23 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.140.1/containers/puppet
+{
+	"name": "Puppet Development Kit (Community)",
+	"dockerFile": "Dockerfile",
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"terminal.integrated.shell.linux": "/bin/bash"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"puppet.puppet-vscode",
+		"rebornix.Ruby"
+	]
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "pdk --version",
+}

.gitignore

@@ -25,3 +25,4 @@
 .project
 .envrc
 /inventory.yaml
+/spec/fixtures/litmus_inventory.yaml

.pdkignore

@@ -25,13 +25,16 @@
 .project
 .envrc
 /inventory.yaml
+/spec/fixtures/litmus_inventory.yaml
 /appveyor.yml
+/.editorconfig
 /.fixtures.yml
 /Gemfile
 /.gitattributes
 /.gitignore
 /.gitlab-ci.yml
 /.pdkignore
+/.puppet-lint.rc
 /Rakefile
 /rakelib/
 /.rspec
@@ -40,3 +43,5 @@
 /.yardopts
 /spec/
 /.vscode/
+/.sync.yml
+/.devcontainer/