Add codecov

Author: xu42

README.md

@@ -3,7 +3,7 @@ China Mobile Number SDK for Java
 
 [![Build Status](https://travis-ci.org/xu42/china-mobile-number-java-sdk.png?branch=master)](https://travis-ci.org/xu42/china-mobile-number-java-sdk)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.github.xu42/china-mobile-number/badge.svg?style=flat)](https://maven-badges.herokuapp.com/maven-central/com.github.xu42/china-mobile-number)
-[![Code Coverage](https://codecov.io/github/xu42/china-mobile-number-java-sdk/coverage.svg)](https://codecov.io/gh/xu42/china-mobile-number-java-sdk)
+[![Code Coverage](https://codecov.io/github/xu42/china-mobile-number-java-sdk/branch/master/graph/badge.svg)](https://codecov.io/gh/xu42/china-mobile-number-java-sdk)
 
 Getting Started
 ---------------

pom.xml

@@ -111,6 +111,25 @@
                     <autoReleaseAfterClose>false</autoReleaseAfterClose>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>0.8.5</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>report</id>
+                        <phase>test</phase>
+                        <goals>
+                            <goal>report</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>