Update requests from 2.25.1 to 2.27.1

An update is motivated by the following error (example job with error):

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed.
       This behaviour is the source of the following dependency conflicts.

       test-tools 0.0.0 requires requests==2.27.1, but you have requests 2.25.1 which is incompatible.

request update removes the above error and passes all tests on CI: https://gitlab.syncad.com/hive/hive/-/pipelines/52273.

requirements-test.txt

@@ -3,7 +3,7 @@ setuptools
 wheel
 future==0.18.2
 ecdsa==0.16.1
-requests==2.25.1
+requests==2.27.1
 websocket-client==0.58.0
 pytz==2021.1
 pycryptodomex==3.10.1
@@ -29,4 +29,4 @@ codacy-coverage
 virtualenv
 codecov
 diff_match_patch
-asn1crypto
\ No newline at end of file
+asn1crypto