Bump junit from 4.12 to 4.13.1

Bumps [junit](https://github.com/junit-team/junit4) from 4.12 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.12.md)
- [Commits](https://github.com/junit-team/junit4/compare/r4.12...r4.13.1)

Signed-off-by: dependabot[bot] <support@github.com>

.travis.yml

@@ -1,6 +1,11 @@
+dist: trusty
 language: java
 jdk:
+  - openjdk8
   - oraclejdk8
   - oraclejdk9
-  - openjdk8
-  - openjdk9
+  - oraclejdk11
+script:
+  - mvn test jacoco:report
+after_success:
+  - mvn  coveralls:report

README.md

@@ -1,5 +1,11 @@
-# BetterLists (by Klemek)
-[![Build Status](https://travis-ci.org/Klemek/BetterLists.svg?branch=master)](https://travis-ci.org/Klemek/BetterLists)
+# BetterLists
+[![Maven Central](https://img.shields.io/maven-central/v/com.github.klemek/betterlists.svg)](https://search.maven.org/search?q=g:%22com.github.klemek%22%20AND%20a:%22betterlists%22)
+[![Build Status](https://img.shields.io/travis/Klemek/BetterLists.svg?style=popout)](https://travis-ci.org/Klemek/BetterLists)
+[![Scc Count Badge](https://sloc.xyz/github/klemek/betterlists/?category=code)](https://github.com/boyter/scc/#badges-beta)
+[![Coverage Status](https://img.shields.io/coveralls/github/Klemek/BetterLists.svg)](https://coveralls.io/github/Klemek/BetterLists?branch=master)
+![License](https://img.shields.io/github/license/Klemek/BetterLists.svg)
+[![Language grade: Java](https://img.shields.io/lgtm/grade/java/g/Klemek/BetterLists.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/Klemek/BetterLists/context:java)
+[![Total alerts](https://img.shields.io/lgtm/alerts/g/Klemek/BetterLists.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/Klemek/BetterLists/alerts/)
 
 An extension of the java.util.List interface which include some of the C# LINQ useful functions.
 
@@ -29,26 +35,19 @@ BetterList<String> contactsEmails = contacts.skip(5)
 
 NOTE : Please note that, unlike C# LINQ, these functions are not optimized at low levels and will have the same impact as standard loops in your program. 
 
+## Download
+
+[betterlists-1.4.jar](../../releases/download/betterlists-1.4/betterlists-1.4.jar)
+
 ## Maven
 
 You can use this project as a maven dependency with this :
 ```XML
-<repositories>
-    ...
-    <repository>
-        <id>fr.klemek</id>
-        <url>https://github.com/klemek/mvn-repo/raw/master</url>
-    </repository>
-</repositories>
-...
-<dependencies>
-    ...
-    <dependency>
-        <groupId>fr.klemek</groupId>
-        <artifactId>betterlists</artifactId>
-        <version>1.4</version>
-    </dependency>
-</dependencies>
+<dependency>
+    <groupId>com.github.klemek</groupId>
+    <artifactId>betterlists</artifactId>
+    <version>1.4</version>
+</dependency>
 ```
 
 ## All code examples

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.github.klemek</groupId>
     <artifactId>betterlists</artifactId>
-    <version>1.4</version>
+    <version>1.5-SNAPSHOT</version>
 
     <name>BetterLists</name>
     <description>An extension of the java.util.List interface which include some of the C# LINQ
@@ -36,7 +36,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -158,6 +158,27 @@
                     </execution>
                 </executions>
             </plugin>
+            <!-- Unit tests coverage -->
+            <plugin>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>0.8.2</version>
+                <configuration>
+                    <append>true</append>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.eluder.coveralls</groupId>
+                <artifactId>coveralls-maven-plugin</artifactId>
+                <version>4.3.0</version>
+            </plugin>
         </plugins>
     </build>