Fix Java16 build

.travis.yml

@@ -2,7 +2,7 @@ sudo: false
 dist: focal
 language: java
 jdk:
-  - oraclejdk16
+  - openjdk16
 cache:
   directories:
     - '$HOME/.m2/repository'

pom.xml

@@ -51,7 +51,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <spigot-api.version>1.16.3-R0.1-SNAPSHOT</spigot-api.version>
+        <spigot-api.version>1.17.1-R0.1-SNAPSHOT</spigot-api.version>
     </properties>
 
     <repositories>
@@ -99,6 +99,12 @@
                 <version>3.28.0-GA</version>
                 <optional>true</optional>
             </dependency>
+            <dependency>
+                <groupId>com.google.code.findbugs</groupId>
+                <artifactId>jsr305</artifactId>
+                <version>3.0.2</version>
+                <scope>provided</scope>
+            </dependency>
         </dependencies>
     </dependencyManagement>
 
@@ -111,6 +117,10 @@
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
         </dependency>
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+        </dependency>
     </dependencies>
 
     <build>