Bump dependency versions

* maven-plugin-api 3.5.4 to 3.8.1
* maven-core 3.5.4 to 3.8.1
* maven-compat 3.5.4 to 3.8.1
* maven-plugin-annotations 3.5.2 to 3.6.1
* slf4j-simple 1.7.25 to 1.7.32
* gson 2.8.5 to 2.8.7
* httcomponents 4.5.3 to 4.5.13
* junit 4.13.1 to 4.13.2

Author: RagedUnicorn

pom.xml

@@ -227,32 +227,32 @@
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-plugin-api</artifactId>
-      <version>3.5.4</version>
+      <version>3.8.1</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-core</artifactId>
-      <version>3.5.4</version>
+      <version>3.8.1</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-compat</artifactId>
-      <version>3.5.4</version>
+      <version>3.8.1</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven.plugin-tools</groupId>
       <artifactId>maven-plugin-annotations</artifactId>
-      <version>3.5.2</version>
+      <version>3.6.1</version>
     </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-simple</artifactId>
-      <version>1.7.25</version>
+      <version>1.7.32</version>
     </dependency>
     <dependency>
       <groupId>com.google.code.gson</groupId>
       <artifactId>gson</artifactId>
-      <version>2.8.5</version>
+      <version>2.8.7</version>
     </dependency>
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
@@ -262,7 +262,7 @@
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpmime</artifactId>
-      <version>4.5.3</version>
+      <version>4.5.13</version>
     </dependency>
     <dependency>
       <groupId>javax.ws.rs</groupId>
@@ -273,7 +273,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.13.1</version>
+      <version>4.13.2</version>
       <scope>test</scope>
     </dependency>
     <dependency>