Make it a proper Java module (#4)

Author: ptrd

pom.xml

@@ -128,14 +128,14 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.7.0</version>
                 <configuration>
-                    <source>1.7</source>
-                    <target>1.7</target>
+                    <source>9</source>
+                    <target>9</target>
                 </configuration>
             </plugin>
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.1</version>
+                <version>0.8.12</version>
                 <executions>
                     <execution>
                         <id>prepare-agent</id>

src/main/java/module-info.java

@@ -0,0 +1,3 @@
+module io.whitfin.siphash {
+    exports io.whitfin.siphash;
+}