use api independent from gradle plugin

Author: hauner

build.gradle

@@ -7,7 +7,7 @@ plugins {
 }
 
 group 'com.github.hauner.openapi'
-version '0.1.0.B1'
+version '0.1-SNAPSHOT'
 
 targetCompatibility = JavaVersion.VERSION_1_8
 
@@ -25,7 +25,7 @@ dependencies {
     implementation 'org.codehaus.groovy:groovy:2.5.4'
     implementation 'io.swagger.parser.v3:swagger-parser:2.0.12'
     implementation 'org.yaml:snakeyaml:1.25'
-    compileOnly 'com.github.hauner.openapi:openapi-generatr-gradle:0.1-SNAPSHOT'
+    compileOnly 'com.github.hauner.openapi:openapi-generatr-api:1.0.0.B1'
 
     testImplementation ('org.spockframework:spock-core:1.3-groovy-2.5') {
         // avoid conflicts with explicit groovy version