Merge pull request #166 from aistomin/Issue-127

Issue #127. Shirt to Java 15.

Author: aistomin

.travis.yml

@@ -1,7 +1,7 @@
-dist: trusty
+dist: bionic
 language: java
 jdk:
-  - oraclejdk8
+  - oraclejdk15
 branches:
   only:
     - master

README.md

@@ -13,7 +13,7 @@ environmental software that needs to read information from Maven repository.
 ## Getting Started
 
 ### System Requirements
- - JDK 8 or higher.
+ - JDK 15 or higher.
  - Apache Maven 3.3.9 or higher
 
 ### Add Maven Dependency

pom.xml

@@ -43,6 +43,7 @@
         <junitVersion>5.8.2</junitVersion>
         <javadocPluginVersion>3.3.1</javadocPluginVersion>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>15</maven.compiler.source>
     </properties>
     <dependencies>
         <dependency>
@@ -158,29 +159,14 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>8</source>
-                    <target>8</target>
+                    <source>15</source>
+                    <target>15</target>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>com.qulice</groupId>
-                <artifactId>qulice-maven-plugin</artifactId>
-                <version>0.18.19</version>
-                <configuration>
-                    <license>file:${basedir}/LICENSE</license>
-                </configuration>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>check</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.4</version>
+                <version>0.8.7</version>
                 <executions>
                     <execution>
                         <goals>