deps: update dependency com.google.guava:guava-bom to v29 (#180)

This PR contains the following updates: | Package | Update | Change | |---|---|---| | [com.google.guava:guava-bom](https://togithub.com/google/guava) | major | `28.2-android` -> `29.0-android` | --- ### Renovate configuration :date: **Schedule**: At any time (no schedule defined). :vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied. :recycle: **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. :no_bell: **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#googleapis/java-firestore).

Author: renovate-bot

pom.xml

@@ -159,7 +159,7 @@
  <grpc.version>1.28.1</grpc.version>
  <protobuf.version>3.11.4</protobuf.version>
  <junit.version>4.13</junit.version>
- <guava.version>28.2-android</guava.version>
+ <guava.version>29.0-android</guava.version>
  <threeten.version>1.4.3</threeten.version>
  <opencensus.version>0.24.0</opencensus.version>
  <mockito.version>1.10.19</mockito.version>