Update appveyor.yml

Author: javadev

appveyor.yml

@@ -17,6 +17,10 @@ install:
 build_script:
   - mvn clean install -B -DskipTests
 test_script:
-  - mvn clean install -B
+  - mvn clean install jacoco:report -B
+  - mvn -f math-plugin/pom.xml clean package jacoco:report
+  - mvn -f string-plugin/pom.xml clean package jacoco:report
+  - mvn -f lodash-plugin/pom.xml clean package jacoco:report
+  - mvn -f examples/pom.xml clean package
 cache:
   - C:\maven\apache-maven-3.3.9