Rename sdk/sink artifactId to sdk-sink (#89)

Fixes #80

Author: japgolly

sdk/implementation/pom.xml

@@ -51,7 +51,7 @@
     </dependency>
     <dependency>
       <groupId>${project.groupId}</groupId>
-      <artifactId>sink</artifactId>
+      <artifactId>sdk-sink</artifactId>
       <version>${project.version}</version>
     </dependency>
   </dependencies>

sdk/sink/pom.xml

@@ -7,7 +7,7 @@
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
-  <artifactId>sink</artifactId>
+  <artifactId>sdk-sink</artifactId>
 
   <dependencies>
     <dependency>

sinks/v1/sink/pom.xml

@@ -56,7 +56,7 @@
     </dependency>
     <dependency>
       <groupId>com.google.cloud.trace</groupId>
-      <artifactId>sink</artifactId>
+      <artifactId>sdk-sink</artifactId>
       <version>${project.version}</version>
     </dependency>
   </dependencies>