Bump auto-service from 1.0-rc4 to 1.0-rc6 (#87)

Bumps [auto-service](https://github.com/google/auto) from 1.0-rc4 to 1.0-rc6.
- [Release notes](https://github.com/google/auto/releases)
- [Commits](https://github.com/google/auto/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

agent/build.gradle

@@ -50,7 +50,7 @@ project.tasks.jarFileTest.configure {
 tasks.check.dependsOn tasks.jarFileTest
 
 dependencies {
-    compileOnly 'com.google.auto.service:auto-service:1.0-rc4'
+    compileOnly 'com.google.auto.service:auto-service:1.0-rc6'
 
     compile 'net.bytebuddy:byte-buddy:1.10.8'
     compile 'net.bytebuddy:byte-buddy-agent:1.10.8'

junit-platform/build.gradle

@@ -19,7 +19,7 @@ test {
 }
 
 dependencies {
-    compileOnly 'com.google.auto.service:auto-service:1.0-rc4'
+    compileOnly 'com.google.auto.service:auto-service:1.0-rc6'
     compile project(path: ":agent", configuration: 'shadow')
 
     compileOnly 'org.junit.platform:junit-platform-launcher:1.0.0'