fix(sonarcloud): declare test file pattern to properties

Author: StephanGerbeth

sonar-project.properties

@@ -3,6 +3,7 @@ sonar.organization=basics
 
 sonar.cpd.exclusions=./packages/**/*.test.js
 sonar.javascript.lcov.reportPaths=./coverage/lcov.info
+sonar.tests.inclusions=**/*.test.js
 
 # This is the name and version displayed in the SonarCloud UI.
 #sonar.projectName=rxjs-collection