deps: update autovalue.version to v1.7.2 (#35)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.auto.value:auto-value-annotations](https://togithub.com/google/auto) | patch | `1.7.1` -> `1.7.2` |
| [com.google.auto.value:auto-value](https://togithub.com/google/auto) | patch | `1.7.1` -> `1.7.2` |

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pom.xml

@@ -71,7 +71,7 @@
     <iam.version>0.13.0</iam.version>
     <opencensus.version>0.24.0</opencensus.version>
     <findbugs.version>3.0.2</findbugs.version>
-    <autovalue.version>1.7.1</autovalue.version>
+    <autovalue.version>1.7.2</autovalue.version>
     <junit.version>4.13</junit.version>
     <truth.version>1.0.1</truth.version>
     <mockito.version>3.3.3</mockito.version>