update maven plugins, jackson to 2.9.5 and javassist

Author: based2

pom.xml

@@ -46,25 +46,25 @@
         <dependency>
             <groupId>org.javassist</groupId>
             <artifactId>javassist</artifactId>
-            <version>3.21.0-GA</version>
+            <version>3.22.0-GA</version>
             <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
-            <version>2.8.5</version>
+            <version>2.9.5</version>
             <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.8.5</version>
+            <version>2.9.5</version>
             <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.2.4</version>
+            <version>2.8.3</version>
             <optional>true</optional>
         </dependency>
 
@@ -119,7 +119,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.0</version>
+                <version>3.7.0</version>
                 <configuration>
                     <source>1.6</source>
                     <target>1.6</target>
@@ -129,7 +129,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
-                <version>2.2.1</version>
+                <version>3.0.1</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
@@ -142,7 +142,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.9.1</version>
+                <version>3.0.0</version>
                 <executions>
                     <execution>
                         <id>attach-javadocs</id>
@@ -158,7 +158,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <version>1.5</version>
+                <version>1.6</version>
                 <executions>
                     <execution>
                         <id>sign-artifacts</id>
@@ -172,7 +172,7 @@
             <plugin>
                 <groupId>org.sonatype.plugins</groupId>
                 <artifactId>nexus-staging-maven-plugin</artifactId>
-                <version>1.6.7</version>
+                <version>1.6.8</version>
                 <extensions>true</extensions>
                 <configuration>
                     <serverId>ossrh</serverId>
@@ -194,7 +194,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.19.1</version>
+                <version>2.21.0</version>
                 <configuration>
                     <parallel>methods</parallel>
                     <threadCount>1</threadCount>