chore: release bigquery 1.15.0 (#3427)

🤖 I have created a release \*beep\* \*boop\* 
---
## [1.15.0](https://www.github.com/googleapis/google-cloud-go/compare/bigquery/v1.14.0...v1.15.0) (2021-01-14)


### Features

* **bigquery:** add reservation usage stats to query statistics ([#3403](https://www.github.com/googleapis/google-cloud-go/issues/3403)) ([112bcde](https://www.github.com/googleapis/google-cloud-go/commit/112bcdeb7cee1b44f337d3e5398a0d0820e93162))
* **bigquery:** add support for allowing Javascript UDFs to indicate determinism ([#3534](https://www.github.com/googleapis/google-cloud-go/issues/3534)) ([2f417a3](https://www.github.com/googleapis/google-cloud-go/commit/2f417a39d93402fbb1e5e3001645019782d7d656)), refs [#3533](https://www.github.com/googleapis/google-cloud-go/issues/3533)


### Bug Fixes

* **bigquery:** address possible panic due to offset checking in handleInsertErrors  ([#3524](https://www.github.com/googleapis/google-cloud-go/issues/3524)) ([5288511](https://www.github.com/googleapis/google-cloud-go/commit/52885115af3e95cdfd1ec784837fb1df7fe01446)), refs [#3519](https://www.github.com/googleapis/google-cloud-go/issues/3519)

This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

bigquery/CHANGES.md

@@ -1,6 +1,19 @@
 # Changes
 
 
+## [1.15.0](https://www.github.com/googleapis/google-cloud-go/compare/bigquery/v1.14.0...v1.15.0) (2021-01-14)
+
+
+### Features
+
+* **bigquery:** add reservation usage stats to query statistics ([#3403](https://www.github.com/googleapis/google-cloud-go/issues/3403)) ([112bcde](https://www.github.com/googleapis/google-cloud-go/commit/112bcdeb7cee1b44f337d3e5398a0d0820e93162))
+* **bigquery:** add support for allowing Javascript UDFs to indicate determinism ([#3534](https://www.github.com/googleapis/google-cloud-go/issues/3534)) ([2f417a3](https://www.github.com/googleapis/google-cloud-go/commit/2f417a39d93402fbb1e5e3001645019782d7d656)), refs [#3533](https://www.github.com/googleapis/google-cloud-go/issues/3533)
+
+
+### Bug Fixes
+
+* **bigquery:** address possible panic due to offset checking in handleInsertErrors  ([#3524](https://www.github.com/googleapis/google-cloud-go/issues/3524)) ([5288511](https://www.github.com/googleapis/google-cloud-go/commit/52885115af3e95cdfd1ec784837fb1df7fe01446)), refs [#3519](https://www.github.com/googleapis/google-cloud-go/issues/3519)
+
 ## [1.14.0](https://www.github.com/googleapis/google-cloud-go/compare/bigquery/v1.13.0...v1.14.0) (2020-12-04)