updated dependencies

Author: hauner

build.gradle

@@ -13,7 +13,7 @@ plugins {
 group 'com.github.hauner.openapi'
 version '1.0.0.M13'
 
-sourceCompatibility = JavaVersion.VERSION_1_8
+sourceCompatibility = JavaVersion.VERSION_11
 targetCompatibility = JavaVersion.VERSION_1_8
 
 ext {
@@ -58,10 +58,11 @@ compileTestGroovy {
 
 
 dependencies {
-    implementation 'org.codehaus.groovy:groovy:2.5.4'
+    implementation 'org.codehaus.groovy:groovy:2.5.10'
+    implementation 'org.codehaus.groovy:groovy-nio:2.5.10'
     implementation 'org.jetbrains.kotlin:kotlin-stdlib'
-    implementation 'io.swagger.parser.v3:swagger-parser:2.0.17'
-    implementation 'org.openapi4j:openapi-parser:0.8'
+    implementation 'io.swagger.parser.v3:swagger-parser:2.0.19'
+    implementation 'org.openapi4j:openapi-parser:0.9'
     implementation 'com.google.googlejavaformat:google-java-format:1.7'
     compileOnly "com.github.hauner.openapi:openapi-processor-api:$processorApiVersion"