Update README.md

Update version 0.2.0
Update script examples to use Kotlin syntax

README.md

@@ -8,9 +8,9 @@ This way one doesn't need to care about `node` and `npm` installation within JVM
 
 To use the async generator in you Gradle build, apply the plugin:
 
-```groovy
+```kotlin
 plugins {
-  id "com.rivancic.asyncapi-gradle-plugin" version "0.1.0"
+ id("com.rivancic.asyncapi-gradle-plugin") version "0.2.0"
 }
 ```
 
@@ -23,35 +23,35 @@ One can configure following parameters through asyncapi extension:
 
 `asyncapi` and `template` parameters are required to be set.
 
-```groovy
+```kotlin
 asyncapi {
 
  // You want a specific version of the generator because your template might not be compatible with the latest 
  // generator. Check what version you need and perform installation, specifying the exact version.
- version = "1.9.8"
+ version.set("1.14.1")
 
  // Local path or URL pointing to AsyncAPI specification file
- asyncapi = null
+ asyncapi.set(null)
 
  // Name of the generator template like for example <i>@asyncapi/html-template</i> or 
  // <i>https://github.com/asyncapi/html-template</i>
- template = null
+ template.set(null)
 
  // Directory where to put the generated files (defaults to current directory)
- output = "build/asyncapi"
+ output.set("build/asyncapi")
 
  // Output the version number
- printVersion = false
+ printVersion.set(false)
 
  // Enable more specific errors in the console
- debug = false
+ debug.set(false)
 
  // Force writing of the generated files to given directory even if it is a git repo with unstaged files or not empty 
  // dir (defaults to false)
- forceWrite = false
+ forceWrite.set(false)
 
  // Additional parameters that will be passed to templates. Have to be provided as a map.
- parameters = [:]
+ parameters.set(mapOf<String, String>())
 }
 ```
 
@@ -60,10 +60,10 @@ It's planned to support all the [AsyncAPI CLI options](https://github.com/asynca
 Additionally one can leverage [configuration](https://github.com/node-gradle/gradle-node-plugin/blob/3.4.0/docs/usage.md#configuring-the-plugin) 
 of `com.github.node-gradle.node` plugin with `node` extension. For example:
 
-```groovy
+```kotlin
 node {
- download = false
- version = "16.14.0"
+ download.set(true)
+ version.set("21.1.0")
  ...
 }
 ```
@@ -74,4 +74,4 @@ Tasks:
 |--------------------|:-------------------------------------------------------:|
 | `asyncApiGenerate` | Generate code based on the configuration form variables | 
 | `assemble` | Depends on `asyncApiGenerate` task |
-| `clean` | Basic clean task, will delete `build` directory |
+| `clean` | Basic clean task, will delete `build` directory |