::className() -> ::class, added misc github files

.gitattributes

@@ -6,4 +6,5 @@
 README.md export-ignore
 releases.json export-ignore
 CHANGELOG.md export-ignore
-LICENSE export-ignore
+LICENSE export-ignore
+/.github export-ignore

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,3 @@
+# Code of Conduct
+
+Don't be a twat.

.github/CONTRIBUTING.md

@@ -0,0 +1,32 @@
+# Contributing
+
+### New Features
+
+You can request new features by submitting an issue with `[FR]` prefix in the title.
+
+### Bugs
+
+If you find a bug, submit an issue and I promise I will get around to it. Eventually.
+Make sure you search around to see if the same (or similar) issue exists before 
+submitting a new one.
+
+Know how to fix a bug and have too much spare time on your hands? Submit a Pull Request!
+Check out the code conventions below before hand.
+
+## Code Conventions
+
+In addition to [Crafts Guidelines](https://github.com/craftcms/docs/blob/v3/en/coding-guidelines.md):
+
+- Use tabs (4 spaces)
+- Try to keep within the 80 characters line length
+- If function arguments or array values can't fit on one line, break each value onto it's own line
+- Comment as much as possible
+
+#### JavaScript
+
+In addition to the above:
+
+- Write valid ES6
+- Use double quotes `"`
+
+Don't follow my example, try to stick to the above guidelines!

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,17 @@
+### Description
+
+
+
+### Steps to reproduce
+
+1.
+2.
+
+
+### Additional info
+
+- Craft version:
+- SEO version:
+- PHP version:
+- Database driver & version:
+- Other Plugins:

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,7 @@
+Fixes # .
+
+Changes proposed in this pull request:
+
+- 
+- 
+- 

src/Seo.php

@@ -70,36 +70,36 @@ public function init ()
 		// User Permissions
 		if ($craft->getEdition() !== \Craft::Personal) {
 			Event::on(
-				UserPermissions::className(),
+				UserPermissions::class,
 				UserPermissions::EVENT_REGISTER_PERMISSIONS,
 				[$this, 'onRegisterPermissions']
 			);
 		}
 
 		// CP URLs
 		Event::on(
-			UrlManager::className(),
+			UrlManager::class,
 			UrlManager::EVENT_REGISTER_CP_URL_RULES,
 			[$this, 'onRegisterCPUrlRules']
 		);
 
 		// Site URLs
 		Event::on(
-			UrlManager::className(),
+			UrlManager::class,
 			UrlManager::EVENT_REGISTER_SITE_URL_RULES,
 			[$this, 'onRegisterSiteUrlRules']
 		);
 
 		// Field type
 		Event::on(
-			Fields::className(),
+			Fields::class,
 			Fields::EVENT_REGISTER_FIELD_TYPES,
 			[$this, 'onRegisterFieldTypes']
 		);
 
 		// Variable
 		Event::on(
-			CraftVariable::className(),
+			CraftVariable::class,
 			CraftVariable::EVENT_INIT,
 			[$this, 'onRegisterVariable']
 		);
@@ -111,7 +111,7 @@ public function init ()
 			&& !$craft->request->isLivePreview
 		) {
 			Event::on(
-				ErrorHandler::className(),
+				ErrorHandler::class,
 				ErrorHandler::EVENT_BEFORE_HANDLE_EXCEPTION,
 				[$this, 'onBeforeHandleException']
 			);
@@ -128,7 +128,7 @@ public function init ()
 		/** @noinspection PhpUnnecessaryFullyQualifiedNameInspection */
 		if (class_exists(\markhuot\CraftQL\CraftQL::class)) {
 			Event::on(
-				SeoField::className(),
+				SeoField::class,
 				'craftQlGetFieldSchema',
 				[new GetCraftQLSchema, 'handle']
 			);