bump core version

Author: gracekarina

pom.xml

@@ -369,7 +369,7 @@
         <swagger-parser-v2-version>1.0.55-SNAPSHOT</swagger-parser-v2-version>
         <commons-io-version>2.6</commons-io-version>
         <slf4j-version>1.7.30</slf4j-version>
-        <swagger-core-version>2.1.7-SNAPSHOT</swagger-core-version>
+        <swagger-core-version>2.1.8-SNAPSHOT</swagger-core-version>
         <swagger-core-v2-version>1.6.3-SNAPSHOT</swagger-core-v2-version>
         <junit-version>4.13.1</junit-version>
         <testng-version>6.14.2</testng-version>