Update README (#30)

Author: alexbraga

README.md

@@ -39,12 +39,18 @@ _Requires Java 8 or greater._
 </dependency>
 ```
 
-### Gradle
+### Gradle <4.10
 
 ```groovy
 compile 'io.github.cdimascio:dotenv-java:2.2.4'
 ```
 
+### Gradle >=4.10
+
+```groovy
+implementation 'io.github.cdimascio:dotenv-java:2.2.4'
+```
+
 Looking for the Kotlin variant? **get [dotenv-kotlin](https://github.com/cdimascio/dotenv-kotlin)**.
 
 ## Usage
@@ -276,4 +282,4 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
-This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!