fix: set proper version # for x-goog-api-client

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:38a27ba6245f96c3e86df7acb2ebcc33b4f186d9e475efe2d64303aec3d4e0ea
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/spanner/artman_spanner.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/js/spanner-v1.
synthtool > Running generator for google/spanner/admin/database/artman_spanner_admin_database.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/js/spanner-admin-database-v1.
synthtool > Running generator for google/spanner/admin/instance/artman_spanner_admin_instance.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/js/spanner-admin-instance-v1.
.eslintignore
.eslintrc.yml
.github/ISSUE_TEMPLATE/bug_report.md
.github/ISSUE_TEMPLATE/feature_request.md
.github/ISSUE_TEMPLATE/support_request.md
.jsdoc.js
.kokoro/common.cfg
.kokoro/continuous/node10/common.cfg
.kokoro/continuous/node10/docs.cfg
.kokoro/continuous/node10/lint.cfg
.kokoro/continuous/node10/samples-test.cfg
.kokoro/continuous/node10/system-test.cfg
.kokoro/continuous/node10/test.cfg
.kokoro/continuous/node12/common.cfg
.kokoro/continuous/node12/test.cfg
.kokoro/continuous/node8/common.cfg
.kokoro/continuous/node8/test.cfg
.kokoro/docs.sh
.kokoro/lint.sh
.kokoro/presubmit/node10/common.cfg
.kokoro/presubmit/node10/docs.cfg
.kokoro/presubmit/node10/lint.cfg
.kokoro/presubmit/node10/samples-test.cfg
.kokoro/presubmit/node10/system-test.cfg
.kokoro/presubmit/node10/test.cfg
.kokoro/presubmit/node12/common.cfg
.kokoro/presubmit/node12/test.cfg
.kokoro/presubmit/node8/common.cfg
.kokoro/presubmit/node8/test.cfg
.kokoro/presubmit/windows/common.cfg
.kokoro/presubmit/windows/test.cfg
.kokoro/publish.sh
.kokoro/release/docs.cfg
.kokoro/release/docs.sh
.kokoro/release/publish.cfg
.kokoro/samples-test.sh
.kokoro/system-test.sh
.kokoro/test.bat
.kokoro/test.sh
.kokoro/trampoline.sh
.nycrc
.prettierignore
.prettierrc
CODE_OF_CONDUCT.md
CONTRIBUTING.md
LICENSE
README.md
codecov.yaml
renovate.json
samples/README.md
synthtool > Replaced "(const SpannerClient = require\\('\\./spanner_client'\\);)" in src/v1/index.js.
synthtool > Replaced '(module\\.exports\\.SpannerClient = SpannerClient;)' in src/v1/index.js.
synthtool > Replaced '../../package.json' in src/v1/database_admin_client.js.
synthtool > Replaced '../../package.json' in src/v1/instance_admin_client.js.
synthtool > Replaced '../../package.json' in src/v1/spanner_client.js.
synthtool > Replaced 'https:\\/\\/cloud\\.google\\.com[\\s\\*]*http:\\/\\/(.*)[\\s\\*]*\\)' in src/v1/doc/google/protobuf/doc_timestamp.js.
synthtool > No replacements made in **/doc/google/protobuf/doc_timestamp.js for pattern toISOString\], maybe replacement is not longer needed?
synthtool > Replaced '`\\[a-z\\]\\(https:\\/\\/cloud\\.google\\.com\\[-a-z0-9\\]\\*\\[a-z0-9\\]\\)\\?`' in src/v1/doc/google/spanner/admin/instance/v1/doc_spanner_instance_admin.js.
synthtool > Replaced '`\\[a-z\\]\\(https:\\/\\/cloud\\.google\\.com\\[-a-z0-9\\]\\*\\[a-z0-9\\]\\)\\?`' in src/v1/doc/google/spanner/v1/doc_spanner.js.
synthtool > Replaced '`\\(\\[a-z\\]\\(https:\\/\\/cloud\\.google\\.com\\[-a-z0-9\\]\\*\\[a-z0-9\\]\\)\\?\\)\\?`' in src/v1/doc/google/spanner/admin/instance/v1/doc_spanner_instance_admin.js.
synthtool > Replaced '`\\(\\[a-z\\]\\(https:\\/\\/cloud\\.google\\.com\\[-a-z0-9\\]\\*\\[a-z0-9\\]\\)\\?\\)\\?`' in src/v1/doc/google/spanner/v1/doc_spanner.js.
npm WARN deprecated @types/p-retry@3.0.1: This is a stub types definition. p-retry provides its own type definitions, so you do not need this installed.
npm WARN deprecated superagent@3.8.3: Please note that v5.0.1+ of superagent removes User-Agent header by default, therefore you may need to add it yourself (e.g. GitHub blocks requests without a User-Agent header).  This notice will go away with v5.0.2+ once it is released.

> grpc@1.23.1 install /tmpfs/src/git/autosynth/working_repo/node_modules/grpc
> node-pre-gyp install --fallback-to-build --library=static_library

node-pre-gyp WARN Using needle for node-pre-gyp https download 
[grpc] Success: "/tmpfs/src/git/autosynth/working_repo/node_modules/grpc/src/node/extension_binary/node-v57-linux-x64-glibc/grpc_node.node" is installed via remote

> core-js@2.6.9 postinstall /tmpfs/src/git/autosynth/working_repo/node_modules/core-js
> node scripts/postinstall || echo "ignore"

Thank you for using core-js ( https://github.com/zloirock/core-js ) for polyfilling JavaScript standard library!

The project needs your help! Please consider supporting of core-js on Open Collective or Patreon: 
> https://opencollective.com/core-js 
> https://www.patreon.com/zloirock 

Also, the author of core-js ( https://github.com/zloirock ) is looking for a good job -)


> protobufjs@6.8.8 postinstall /tmpfs/src/git/autosynth/working_repo/node_modules/protobufjs
> node scripts/postinstall


> @google-cloud/spanner@4.0.2 prepare /tmpfs/src/git/autosynth/working_repo
> npm run compile


> @google-cloud/spanner@4.0.2 compile /tmpfs/src/git/autosynth/working_repo
> tsc -p . && cp -r src/v1 build/src && cp -r protos build && cp test/*.js build/test

src/database.ts:30:20 - error TS2307: Cannot find module 'request'.

30 import * as r from 'request';
                      ~~~~~~~~~

src/session.ts:27:20 - error TS2307: Cannot find module 'request'.

27 import * as r from 'request';
                      ~~~~~~~~~


Found 4 errors.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @google-cloud/spanner@4.0.2 compile: `tsc -p . && cp -r src/v1 build/src && cp -r protos build && cp test/*.js build/test`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @google-cloud/spanner@4.0.2 compile script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/kbuilder/.npm/_logs/2019-08-21T11_22_45_260Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @google-cloud/spanner@4.0.2 prepare: `npm run compile`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @google-cloud/spanner@4.0.2 prepare script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/kbuilder/.npm/_logs/2019-08-21T11_22_45_357Z-debug.log

> @google-cloud/spanner@4.0.2 fix /tmpfs/src/git/autosynth/working_repo
> gts fix && eslint --fix '**/*.js'


/tmpfs/src/git/autosynth/working_repo/benchmark/ycsb.js
  25:27  error  "../" is not found  node/no-missing-require

/tmpfs/src/git/autosynth/working_repo/scripts/cleanup.js
  17:27  error  "../" is not found  node/no-missing-require

✖ 2 problems (2 errors, 0 warnings)

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @google-cloud/spanner@4.0.2 fix: `gts fix && eslint --fix '**/*.js'`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @google-cloud/spanner@4.0.2 fix script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/kbuilder/.npm/_logs/2019-08-21T11_23_03_625Z-debug.log
synthtool > Cleaned up 2 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #681 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #681   +/-   ##
=======================================
  Coverage   99.18%   99.18%           
=======================================
  Files          11       11           
  Lines        1354     1354           
  Branches      204      204           
=======================================
  Hits         1343     1343           
  Misses          2        2           
  Partials        9        9

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