deps: update dependency com.google.api:gax-bom to v1.64.0-sp.1

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.api:gax-bom	1.63.0 -> 1.64.0-sp.1

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Release Notes

googleapis/gax-java

v1.64.0-sp.1

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Features

• configure initial sp version (#​1381) (037f4d4)

v1.64.0

Compare Source

Features

• release 1.64.0 (#​1375) (499682e)

1.63.4 (2021-05-07)

Bug Fixes

• Make x-goog-api-client header report rest-based transport clients with rest/ token instead of httpson/. (#​1370) (b1b0b49)

1.63.3 (2021-05-04)

Bug Fixes

• fix flaky tests and non blocking semaphore (#​1365) (fc8e520)
• Remove a flacky test in FlowControllerTest (#​1360) (2cca0bf)

1.63.2 (2021-04-30)

Bug Fixes

• Remove default value handling (#​1353) (ed0fc79)

Dependencies

• remove codecov.io (#​1354) (06a53ac)

1.63.1 (2021-04-26)

Bug Fixes

• fix dynamic flow control setting checks (#​1347) (69458b4)
• fix watchdog NPE red herring (#​1344) (06dbf12)

v1.63.4

Compare Source

v1.63.3

Compare Source

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[codecov]

Codecov Report

Merging #443 (5c66c9e) into master (36060a8) will not change coverage.
The diff coverage is n/a.

❗ Current head 5c66c9e differs from pull request most recent head bc912ce. Consider uploading reports for the commit bc912ce to get more accurate results

@@            Coverage Diff            @@
##             master     #443   +/-   ##
=========================================
  Coverage     67.74%   67.74%           
  Complexity      384      384           
=========================================
  Files            36       36           
  Lines          1981     1981           
  Branches        267      267           
=========================================
  Hits           1342     1342           
  Misses          531      531           
  Partials        108      108           

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