deps: update core dependencies (#59)
deps: update core dependencies (#59)

* deps: update core dependencies

* deps: update dependency com.google.protobuf:protobuf-bom to v3.11.3

* deps: update dependency com.google.http-client:google-http-client-bom to v1.34.1

Co-authored-by: WhiteSource Renovate <4e3adfceaad659ebdd3c586014a0b3732b1fa93f@gmail.com>

looker-open-source/java-spanner,looker-open-source/java-spanner,googleapis/java-spanner,googleapis/java-spanner,googleapis/java-spanner,looker-open-source/java-spanner