bump jackson dependency to 2.9.9

thereby fixing moderate security alert associated with jackson-databind up to 2.9.8

pom.xml

@@ -8,7 +8,7 @@
 
     <groupId>com.github.victools</groupId>
     <artifactId>jsonschema-generator</artifactId>
-    <version>1.1.0-SNAPSHOT</version>
+    <version>1.0.2</version>
     <packaging>jar</packaging>
 
     <licenses>
@@ -27,7 +27,7 @@
         <connection>scm:git:ssh://github.com/victools/jsonschema-generator.git</connection>
         <developerConnection>scm:git:ssh://git@github.com/victools/jsonschema-generator.git</developerConnection>
         <url>https://github.com/victools/jsonschema-generator</url>
-        <tag>HEAD</tag>
+        <tag>v1.0.2</tag>
     </scm>
 
     <organization>
@@ -58,7 +58,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
 
-        <version.jackson>2.9.8</version.jackson>
+        <version.jackson>2.9.9</version.jackson>
         <version.jsonassert>1.5.0</version.jsonassert>
         <version.junit>4.12</version.junit>
         <version.junitparams>1.1.1</version.junitparams>