upgrade json-schema-validator to 1.0.18

Author: stevehu

pom.xml

@@ -84,7 +84,7 @@
         <java.version>11</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <version.light-4j>2.0.3-SNAPSHOT</version.light-4j>
-        <version.json-schema-validator>1.0.15</version.json-schema-validator>
+        <version.json-schema-validator>1.0.18</version.json-schema-validator>
         <version.jackson>2.9.9</version.jackson>
         <version.slf4j>1.7.25</version.slf4j>
         <version.jose4j>0.6.3</version.jose4j>