chore: release 1.20.0

[release-please]

🤖 I have created a release *beep* *boop*

1.20.0 (2021-04-20)

Features

• new JSON type through BigQuery Write (#1013) (357e811)

Bug Fixes

• It seems GAPIC is not generated expected headers for bidi streaming client lib, apply a temp fix to unblock customers (#1017) (9c1ed55)

Dependencies

• update dependency com.google.cloud:google-cloud-shared-dependencies to v0.21.1 (#1018) (827764e)

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[codecov]

Codecov Report

Merging #1015 (2f3a694) into master (9c1ed55) will increase coverage by 0.21%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1015      +/-   ##
============================================
+ Coverage     79.79%   80.01%   +0.21%     
- Complexity      678      709      +31     
============================================
  Files            61       61              
  Lines          3881     3963      +82     
  Branches        261      264       +3     
============================================
+ Hits           3097     3171      +74     
- Misses          668      669       +1     
- Partials        116      123       +7     

Impacted Files	Coverage Δ	Complexity Δ
.../bigquery/storage/v1beta2/BigQueryWriteClient.java	75.38% <0.00%> (-3.93%)	33.00% <0.00%> (+7.00%)	⬇️
...d/bigquery/storage/v1beta2/JsonToProtoMessage.java	97.10% <0.00%> (-0.71%)	46.00% <0.00%> (ø%)
...ud/bigquery/storage/v1/BaseBigQueryReadClient.java	60.97% <0.00%> (-0.57%)	12.00% <0.00%> (+2.00%)	⬇️
...gquery/storage/v1beta2/BaseBigQueryReadClient.java	60.97% <0.00%> (-0.57%)	12.00% <0.00%> (+2.00%)	⬇️
...cloud/bigquery/storage/v1beta2/StreamWriterV2.java	96.13% <0.00%> (+0.01%)	39.00% <0.00%> (ø%)
...torage/v1beta2/BQTableSchemaToProtoDescriptor.java	98.48% <0.00%> (+0.07%)	8.00% <0.00%> (ø%)
...e/cloud/bigquery/storage/v1beta2/StreamWriter.java	82.33% <0.00%> (+0.12%)	32.00% <0.00%> (ø%)
...oud/bigquery/storage/v1beta2/JsonStreamWriter.java	76.52% <0.00%> (+0.20%)	14.00% <0.00%> (ø%)
...rage/v1beta1/stub/EnhancedBigQueryStorageStub.java	89.61% <0.00%> (+0.27%)	10.00% <0.00%> (+2.00%)
...uery/storage/v1/stub/EnhancedBigQueryReadStub.java	88.05% <0.00%> (+0.36%)	8.00% <0.00%> (+2.00%)
... and 13 more

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🤖 Release is at https://github.com/googleapis/java-bigquerystorage/releases/tag/v1.20.0 🌻

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