Add phpcs dependency; fix coverage folder

.gitignore

@@ -5,4 +5,5 @@ vendor/
 .DS_Store
 .phpunit.result.cache
 .test-secrets
-composer.lock
\ No newline at end of file
+composer.lock
+build/
\ No newline at end of file

composer.json

@@ -22,7 +22,8 @@
   "require-dev": {
     "simplesamlphp/simplesamlphp-test-framework": "^1.2",
     "phpunit/phpunit": "^9.5",
-    "psalm/plugin-phpunit": "^0.18.3"
+    "psalm/plugin-phpunit": "^0.18.3",
+    "squizlabs/php_codesniffer": "^3.7"
   },
   "autoload": {
     "psr-4": {

phpunit.xml

@@ -7,7 +7,7 @@
     </testsuites>
     <coverage processUncoveredFiles="true">
         <include>
-            <directory>./lib</directory>
+            <directory>./src</directory>
         </include>
         <report>
             <clover outputFile="build/logs/clover.xml"/>