deps: bump shared-deps version and add back certain test deps (#24)

Author: stephaniewang526

pom.xml

@@ -86,10 +86,18 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>
-        <version>0.3.1</version>
+        <version>0.5.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
+
+      <!-- Test dependencies -->
+      <dependency>
+        <groupId>junit</groupId>
+        <artifactId>junit</artifactId>
+        <version>4.13</version>
+        <scope>test</scope>
+      </dependency>
     </dependencies>
   </dependencyManagement>