Add Firebase Admin Maven artifact (#500)

## What is the goal of this PR?

Add `firebase-admin` Maven artifact for working with the Google Identity
service as used by TypeDB Platform.

## What are the changes implemented in this PR?

Add `firebase-admin` and update `google-auth-library-credentials` as
well as `google-auth-library-oauth2-http`, to the version that is
compatible with it.

---------

Co-authored-by: James Williams <james.williams@vaticle.com>

Author: lolski

library/maven/artifacts.bzl

@@ -29,8 +29,8 @@ artifacts = {
     "com.google.api.grpc:proto-google-common-protos" : "2.9.0",
     "com.google.api:gax": "1.64.0",
     "com.google.api:gax-grpc": "1.64.0",
-    "com.google.auth:google-auth-library-credentials": "0.22.0",
-    "com.google.auth:google-auth-library-oauth2-http" : "0.22.0",
+    "com.google.auth:google-auth-library-credentials": "1.6.0",
+    "com.google.auth:google-auth-library-oauth2-http" : "1.6.0",
     "com.google.auto.value:auto-value" : "1.9",
     "com.google.auto.value:auto-value-annotations" : "1.9",
     "com.google.cloud:google-cloud-secretmanager": "1.5.2",
@@ -40,6 +40,7 @@ artifacts = {
     "com.google.errorprone:error_prone_annotations": "2.9.0",
     "com.google.guava:failureaccess" : "1.0.1",
     "com.google.guava:guava": "30.1-jre",
+    "com.google.firebase:firebase-admin": "9.1.1",
     "com.google.http-client:google-http-client": "1.34.2",
     "com.google.inject:guice": "4.2.2",
     "com.google.j2objc:j2objc-annotations" : "1.3",