Update to version 2.0.6

Author: akshay-ap

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>blockchains.iaas.uni.stuttgart.de</groupId>
     <artifactId>blockchain-access-layer-api</artifactId>
-    <version>2.0.5</version>
+    <version>2.0.6</version>
 
     <properties>
         <maven.compiler.source>8</maven.compiler.source>
@@ -61,5 +61,10 @@
             <version>5.4.0</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.12.0</version>
+        </dependency>
     </dependencies>
 </project>

src/main/java/blockchains/iaas/uni/stuttgart/de/api/interfaces/BlockchainAdapter.java

@@ -17,9 +17,8 @@
 import blockchains.iaas.uni.stuttgart.de.api.exceptions.InvalidTransactionException;
 import blockchains.iaas.uni.stuttgart.de.api.exceptions.NotSupportedException;
 import blockchains.iaas.uni.stuttgart.de.api.model.*;
-import com.github.arteam.simplejsonrpc.core.annotation.JsonRpcOptional;
-import com.github.arteam.simplejsonrpc.core.annotation.JsonRpcParam;
 import io.reactivex.Observable;
+import org.apache.commons.lang3.tuple.ImmutablePair;
 
 import java.math.BigDecimal;
 import java.util.List;
@@ -95,6 +94,7 @@ CompletableFuture<Transaction> invokeSmartContract(
             String signature,
             String signer,
             List<String> signers,
+            List<ImmutablePair<String, String>> signatures,
             long minimumNumberOfSignatures
 
     ) throws BalException;