chore(deps): update dependency google-api-python-client to v1.12.5 (GoogleCloudPlatform#4892)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [google-api-python-client](https://togithub.com/googleapis/google-api-python-client) | patch | `==1.12.4` -> `==1.12.5` |

---

### Release Notes

<details>
<summary>googleapis/google-api-python-client</summary>

### [`v1.12.5`](https://togithub.com/googleapis/google-api-python-client/blob/master/CHANGELOG.md#&#8203;1125-httpswwwgithubcomgoogleapisgoogle-api-python-clientcomparev1124v1125-2020-10-22)

[Compare Source](https://togithub.com/googleapis/google-api-python-client/compare/v1.12.4...v1.12.5)

</details>

---

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appengine/standard/mailgun/requirements-test.txt

@@ -1,4 +1,4 @@
 pytest==4.6.11; python_version < '3.0'
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 mock==3.0.5; python_version < '3.0'
 WebTest==2.0.35

appengine/standard/pubsub/requirements.txt

@@ -1,2 +1,2 @@
 Flask==1.1.2
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5

appengine/standard/storage/api-client/requirements.txt

@@ -1,3 +1,3 @@
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 google-auth==1.22.1
 google-auth-httplib2==0.0.4

appengine/standard_python3/pubsub/requirements.txt

@@ -1,4 +1,4 @@
 Flask==1.1.2
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 google-auth==1.22.1
 google-cloud-pubsub==1.7.0

auth/api-client/requirements.txt

@@ -1,3 +1,3 @@
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 google-auth-httplib2==0.0.4
 google-auth==1.22.1

auth/end-user/web/requirements.txt

@@ -1,6 +1,6 @@
 google-auth==1.22.1
 google-auth-oauthlib==0.4.1
 google-auth-httplib2==0.0.4
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 flask==1.1.2
 requests==2.24.0

compute/api/requirements.txt

@@ -1,3 +1,3 @@
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 google-auth==1.22.1
 google-auth-httplib2==0.0.4

compute/auth/requirements.txt

@@ -1,4 +1,4 @@
 requests==2.24.0
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 google-auth==1.22.1
 google-auth-httplib2==0.0.4

compute/encryption/requirements.txt

@@ -1,5 +1,5 @@
 cryptography==3.1.1
 requests==2.24.0
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 google-auth==1.22.1
 google-auth-httplib2==0.0.4

compute/oslogin/requirements.txt

@@ -1,4 +1,4 @@
-google-api-python-client==1.12.4
+google-api-python-client==1.12.5
 google-auth==1.22.1
 google-auth-httplib2==0.0.4
 requests==2.24.0