fix readme

Author: ajs1998

README.md

@@ -21,7 +21,7 @@ repositories {
 
 ```gradle
 dependencies {
-    implementation 'me.alexjs:dag:1.9'
+    implementation 'me.alexjs:dag:1.10'
 }
 ```
 
@@ -97,5 +97,5 @@ DagUtil.traverse(dag, i -> result.add(i), executorService);
 - Flexible `Dag<T>` interface so you can write your own implementation
 - 100% test coverage
 - 100% Javadoc coverage
-- I recommend using at least version `1.9`. Previous versions had little documentation, less test coverage, and fewer 
+- I recommend using at least version `1.10`. Previous versions had little documentation, less test coverage, and fewer 
   features