🤖 I have created a release \*beep\* \*boop\* 
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### Updating meta-information for bleeding-edge SNAPSHOT release.
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).

…179)

* fix: Timestamp.of(java.sql.Timestamp) pre-epoch on exact second

* fix: review comments

* fix: review comments

* fix: make all testOf method consistent

To avoid linkage errors

…-plugin to v3.2.0 (#185)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| org.apache.maven.plugins:maven-javadoc-plugin | minor | `3.1.1` -> `3.2.0` |

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This PR was generated using Autosynth. 🌈


<details><summary>Log from Synthtool</summary>

```
2020-03-14 02:16:30,909 synthtool > Executing /tmpfs/src/git/autosynth/working_repo/synth.py.
.github/ISSUE_TEMPLATE/bug_report.md
.github/ISSUE_TEMPLATE/feature_request.md
.github/ISSUE_TEMPLATE/support_request.md
.github/PULL_REQUEST_TEMPLATE.md
.github/release-please.yml
.github/trusted-contribution.yml
.kokoro/build.bat
.kokoro/build.sh
.kokoro/coerce_logs.sh
.kokoro/common.cfg
.kokoro/continuous/common.cfg
.kokoro/continuous/dependencies.cfg
.kokoro/continuous/integration.cfg
.kokoro/continuous/java11.cfg
.kokoro/continuous/java7.cfg
.kokoro/continuous/java8-osx.cfg
.kokoro/continuous/java8-win.cfg
.kokoro/continuous/java8.cfg
.kokoro/continuous/lint.cfg
.kokoro/continuous/propose_release.cfg
.kokoro/continuous/samples.cfg
.kokoro/dependencies.sh
.kokoro/linkage-monitor.sh
.kokoro/nightly/common.cfg
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.kokoro/nightly/integration.cfg
.kokoro/nightly/java11.cfg
.kokoro/nightly/java7.cfg
.kokoro/nightly/java8-osx.cfg
.kokoro/nightly/java8-win.cfg
.kokoro/nightly/java8.cfg
.kokoro/nightly/lint.cfg
.kokoro/nightly/samples.cfg
.kokoro/presubmit/clirr.cfg
.kokoro/presubmit/common.cfg
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.kokoro/presubmit/java11.cfg
.kokoro/presubmit/java7.cfg
.kokoro/presubmit/java8-osx.cfg
.kokoro/presubmit/java8-win.cfg
.kokoro/presubmit/java8.cfg
.kokoro/presubmit/linkage-monitor.cfg
.kokoro/presubmit/lint.cfg
.kokoro/presubmit/samples.cfg
.kokoro/release/bump_snapshot.cfg
.kokoro/release/common.cfg
.kokoro/release/common.sh
.kokoro/release/drop.cfg
.kokoro/release/drop.sh
.kokoro/release/promote.cfg
.kokoro/release/promote.sh
.kokoro/release/publish_javadoc.cfg
.kokoro/release/publish_javadoc.sh
.kokoro/release/snapshot.cfg
.kokoro/release/snapshot.sh
.kokoro/release/stage.cfg
.kokoro/release/stage.sh
.kokoro/trampoline.sh
CODE_OF_CONDUCT.md
CONTRIBUTING.md
LICENSE
README.md
codecov.yaml
java.header
license-checks.xml
renovate.json
2020-03-14 02:16:31,108 synthtool > Wrote metadata to synth.metadata.

```
</details>

* updated CHANGELOG.md [ci skip]

* updated README.md [ci skip]

* updated versions.txt [ci skip]

* updated google-cloud-core-bom/pom.xml [ci skip]

* updated google-cloud-core-grpc/pom.xml [ci skip]

* updated google-cloud-core-http/pom.xml [ci skip]

* updated google-cloud-core/pom.xml [ci skip]

* updated pom.xml [ci skip]

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>