Compile against 1.15

pom.xml

@@ -2,13 +2,13 @@
    <modelVersion>4.0.0</modelVersion>
    <groupId>nl.Steffion</groupId>
    <artifactId>BlockHunt</artifactId>
-   <version>0.4.0-SNAPSHOT</version>
+   <version>0.5.0-SNAPSHOT</version>
    <name>BlockHunt</name>
   <properties>
     <plugin.version>${project.version}-${buildnumber}</plugin.version>
     <buildnumber />
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <spigot.api.version>1.13</spigot.api.version>
+    <spigot.api.version>1.15</spigot.api.version>
     <spigot.version>${spigot.api.version}.2-R0.1-SNAPSHOT</spigot.version>
   </properties>
   <scm>
@@ -73,7 +73,7 @@
     <dependency>
       <groupId>LibsDisguises</groupId>
       <artifactId>LibsDisguises</artifactId>
-      <version>9.7.1-SNAPSHOT</version>
+      <version>9.9.9</version>
       <scope>provided</scope>
       <exclusions>
         <exclusion>
@@ -109,7 +109,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>2.3.2</version>
+        <version>3.8.1</version>
         <configuration>
           <source>1.8</source>
           <target>1.8</target>
@@ -119,7 +119,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-release-plugin</artifactId>
-        <version>2.5.1</version>
+        <version>2.5.3</version>
       </plugin>
     </plugins>
   </build>