Set compiler and surefire plugin versions, fix warnings in pom

Author: imustafin

pom.xml

@@ -13,11 +13,17 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
                 <configuration>
                   <source>8</source>
                   <target>8</target>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.22.2</version>
+            </plugin>
             <plugin>
               <artifactId>maven-assembly-plugin</artifactId>
               <configuration>
@@ -69,7 +75,7 @@
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>RELEASE</version>
+            <version>5.5.2</version>
             <scope>test</scope>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.mockito/mockito-core -->
@@ -90,13 +96,6 @@
             <artifactId>hsqldb</artifactId>
             <version>1.8.0.10</version>
         </dependency>
-        <dependency>
-            <groupId>hsqldb</groupId>
-            <artifactId>hsqldb</artifactId>
-            <version>1.8.0.10</version>
-        </dependency>
-
-
     </dependencies>