Bump google-cloud-pubsub from 2.15.2 to 2.19.6

Bumps [google-cloud-pubsub](https://github.com/googleapis/python-pubsub) from 2.15.2 to 2.19.6.
- [Release notes](https://github.com/googleapis/python-pubsub/releases)
- [Changelog](https://github.com/googleapis/python-pubsub/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-pubsub@v2.15.2...v2.19.6)

---
updated-dependencies:
- dependency-name: google-cloud-pubsub
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -97,16 +97,11 @@ charset-normalizer==3.1.0 \
     --hash=sha256:f8303414c7b03f794347ad062c0516cee0e15f7a612abd0ce1e25caf6ceb47df \
     --hash=sha256:fca62a8301b605b954ad2e9c3666f9d97f63872aa4efcae5492baca2056b74ab
     # via requests
-# This requirement duplicates the line below, without an extra. We need this to
-# work around https://github.com/pypa/pip/issues/9644 because we can't use
-# --no-deps when this gets installed by GCF
-google-api-core==2.11.0 \
-    --hash=sha256:4b9bb5d5a380a0befa0573b302651b8a9a89262c1730e37bf423cec511804c22 \
-    --hash=sha256:ce222e27b0de0d7bc63eb043b956996d6dccab14cc3b690aaea91c9cc99dc16e
 google-api-core[grpc]==2.11.0 \
     --hash=sha256:4b9bb5d5a380a0befa0573b302651b8a9a89262c1730e37bf423cec511804c22 \
     --hash=sha256:ce222e27b0de0d7bc63eb043b956996d6dccab14cc3b690aaea91c9cc99dc16e
     # via
+    #   google-api-core
     #   google-cloud-bigquery
     #   google-cloud-core
     #   google-cloud-pubsub
@@ -117,6 +112,7 @@ google-auth==2.16.3 \
     # via
     #   google-api-core
     #   google-cloud-core
+    #   google-cloud-pubsub
     #   google-cloud-storage
 google-cloud-bigquery==3.7.0 \
     --hash=sha256:cf9f543fad3aaf4871c53f56b718e1ef94a9a778b17f16890015f6fc25c328ec \
@@ -128,9 +124,9 @@ google-cloud-core==2.3.2 \
     # via
     #   google-cloud-bigquery
     #   google-cloud-storage
-google-cloud-pubsub==2.15.2 \
-    --hash=sha256:9ec481211db781dfca0ac182259ecb078ed504062aacbf3d0cb7ce261c9690c9 \
-    --hash=sha256:f3a652ae4436034ed51fc884afbef7f69cbe0325129531545e49f017c1ef1401
+google-cloud-pubsub==2.19.6 \
+    --hash=sha256:4eae4bc98463dbdaead7597f7666ffe14fc62aabed10e3e322c95cb050fa7dbe \
+    --hash=sha256:9edf5ce5642a19567dd71e47b50e63f12ad8072174c01a027d4b52864c74b27d
     # via -r requirements.in
 google-cloud-storage==2.7.0 \
     --hash=sha256:1ac2d58d2d693cb1341ebc48659a3527be778d9e2d8989697a2746025928ff17 \
@@ -212,12 +208,6 @@ google-resumable-media==2.4.1 \
     # via
     #   google-cloud-bigquery
     #   google-cloud-storage
-# This requirement duplicates the line below, without an extra. We need this to
-# work around https://github.com/pypa/pip/issues/9644 because we can't use
-# --no-deps when this gets installed by GCF
-googleapis-common-protos==1.59.0 \
-    --hash=sha256:4168fcb568a826a52f23510412da405abd93f4d23ba544bb68d943b14ba3cb44 \
-    --hash=sha256:b287dc48449d1d41af0c69f4ea26242b5ae4c3d7249a38b0984c86a4caffff1f
 googleapis-common-protos[grpc]==1.59.0 \
     --hash=sha256:4168fcb568a826a52f23510412da405abd93f4d23ba544bb68d943b14ba3cb44 \
     --hash=sha256:b287dc48449d1d41af0c69f4ea26242b5ae4c3d7249a38b0984c86a4caffff1f