Use non-deprecated name in pyproject.toml (#812)

* Use non-deprecated name in pyproject.toml

* Update secret.py

Author: alex

pyproject.toml

@@ -3,7 +3,7 @@
 requires = [
     "setuptools>=40.8.0",
     "wheel",
-    "cffi>=1.4.1; python_implementation != 'PyPy'",
+    "cffi>=1.4.1; platform_python_implementation != 'PyPy'",
 ]
 build-backend = "setuptools.build_meta"
 

src/nacl/secret.py

@@ -52,9 +52,9 @@ class SecretBox(encoding.Encodable, StringFixer):
     KEY_SIZE: ClassVar[int] = nacl.bindings.crypto_secretbox_KEYBYTES
     NONCE_SIZE: ClassVar[int] = nacl.bindings.crypto_secretbox_NONCEBYTES
     MACBYTES: ClassVar[int] = nacl.bindings.crypto_secretbox_MACBYTES
-    MESSAGEBYTES_MAX: ClassVar[
-        int
-    ] = nacl.bindings.crypto_secretbox_MESSAGEBYTES_MAX
+    MESSAGEBYTES_MAX: ClassVar[int] = (
+        nacl.bindings.crypto_secretbox_MESSAGEBYTES_MAX
+    )
 
     def __init__(
         self, key: bytes, encoder: encoding.Encoder = encoding.RawEncoder