Parents should be notified about test results

lib/TestResult.js

@@ -114,8 +114,11 @@ class TestResult {
 			`(${this.percentage}%) which is a grade ` +
 			`${this.grade}`;
 
+		const parents = await this.student.getParents();
+
 		const email = new EmailBuilder()
-			.addTo([ this.student.getEmail() ])
+			.addTo([ this.student, ...parents ]
+				.map(u => u.getEmail()))
 			.setSubject('Stratos - Test result changed')
 			.setBody(body);