Upgrade to Java 11

Includes (optional) Servlet API 6.0 (Jakarta EE 10), only applicable if you use
ActiveRequestsFilter.

.github/workflows/build.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '8', '17', '21' ]
+        java: [ '11', '17', '21' ]
     name: build java ${{ matrix.java }}
     env:
       MAVEN_ARGS: --show-version --no-transfer-progress

.java-version

@@ -0,0 +1 @@
+11

pom.xml

@@ -41,9 +41,8 @@
     </licenses>
 
     <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <logback.version>1.3.14</logback.version>
+        <maven.compiler.release>11</maven.compiler.release>
+        <logback.version>1.4.14</logback.version>
     </properties>
 
     <dependencyManagement>
@@ -65,7 +64,7 @@
             <dependency>
                 <groupId>org.mockito</groupId>
                 <artifactId>mockito-bom</artifactId>
-                <version>4.11.0</version>
+                <version>5.12.0</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -84,9 +83,9 @@
 
         <!-- Optional dependencies -->
         <dependency>
-            <groupId>javax.servlet</groupId>
-            <artifactId>javax.servlet-api</artifactId>
-            <version>4.0.1</version>
+            <groupId>jakarta.servlet</groupId>
+            <artifactId>jakarta.servlet-api</artifactId>
+            <version>6.0.0</version>
             <optional>true</optional>
         </dependency>
         <dependency>

src/main/java/no/digipost/monitoring/servlet/ActiveRequestsFilter.java

@@ -16,14 +16,14 @@
 package no.digipost.monitoring.servlet;
 
 import io.micrometer.core.instrument.MeterRegistry;
+import jakarta.servlet.Filter;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.FilterConfig;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.ServletRequest;
+import jakarta.servlet.ServletResponse;
+import jakarta.servlet.http.HttpServletRequest;
 
-import javax.servlet.Filter;
-import javax.servlet.FilterChain;
-import javax.servlet.FilterConfig;
-import javax.servlet.ServletException;
-import javax.servlet.ServletRequest;
-import javax.servlet.ServletResponse;
-import javax.servlet.http.HttpServletRequest;
 import java.io.IOException;
 import java.time.Duration;
 import java.time.Instant;