Support cryptography 3.3 (#882)

* Re-add Debian Bullseye to CI.

* Support cryptography 3.3 as well.

plugins/modules/openssl_dhparam.py

@@ -17,7 +17,7 @@ description:
   - The module can use the cryptography Python library, or the C(openssl) executable. By default, it tries to detect which
     one is available. This can be overridden with the O(select_crypto_backend) option.
 requirements:
-  - Either cryptography >= 3.4
+  - Either cryptography >= 3.3
   - Or OpenSSL binary C(openssl)
 author:
   - Thom Wiggers (@thomwiggers)
@@ -139,6 +139,9 @@ from ansible.module_utils.common.text.converters import to_native
 from ansible_collections.community.crypto.plugins.module_utils.crypto.math import (
     count_bits,
 )
+from ansible_collections.community.crypto.plugins.module_utils.cryptography_dep import (
+    COLLECTION_MINIMUM_CRYPTOGRAPHY_VERSION,
+)
 from ansible_collections.community.crypto.plugins.module_utils.io import (
     load_file_if_exists,
     write_file,
@@ -148,7 +151,7 @@ from ansible_collections.community.crypto.plugins.module_utils.version import (
 )
 
 
-MINIMAL_CRYPTOGRAPHY_VERSION = "3.4"
+MINIMAL_CRYPTOGRAPHY_VERSION = COLLECTION_MINIMUM_CRYPTOGRAPHY_VERSION
 
 CRYPTOGRAPHY_IMP_ERR = None
 try: