Add gradle tasks for updating version in readme

README.md

@@ -56,6 +56,9 @@ Then add the following dependencies in your app `build.gradle` or `build.gradle.
 
 **Groovy**
 
+<!-- 
+    If format of version definition is changed, make sure to update `generateReadme` task
+-->
 ```groovy
 def sentinelVersion = "1.4.1"
 debugImplementation "com.infinum.sentinel:sentinel:$sentinelVersion"

sentinel/build.gradle

@@ -125,4 +125,8 @@ project.gradle.taskGraph.whenReady {
     connectedDebugAndroidTest {
         ignoreFailures = true
     }
-}
+}
+
+apply from: '../tasks.gradle'
+preBuild.dependsOn ':sentinel:generateReadme'
+

tasks.gradle

@@ -0,0 +1,13 @@
+apply from: '../config.gradle'
+
+private void replaceVersionsInFile(File file) {
+    def content = file.text
+    content = content.replaceAll(~/sentinelVersion\s*=\s*".*"/, "sentinelVersion = \"${releaseConfig.version}\"")
+    file.setText(content)
+}
+
+tasks.register('generateReadme') {
+    doFirst {
+        replaceVersionsInFile(new File("${rootDir}/README.md"))
+    }
+}