pom: add future-converter to jetcd project
future-converter converts listenablefuture to completablefuture or vice versa.
<!-- dependencies -->
<grpc.version>1.2.0</grpc.version>
<slf4j.version>1.7.21</slf4j.version>
+ <future-converter.version>1.1.0</future-converter.version>
<!-- should be in sync with protobuf grpc dependencies -->
<protobuf.version>3.2.0</protobuf.version>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
+ <dependency>
+ <groupId>net.javacrumbs.future-converter</groupId>
+ <artifactId>future-converter-java8-guava</artifactId>
+ <version>${future-converter.version}</version>
+ </dependency>
<dependency>
<groupId>org.testng</groupId>
