chore(handlers/gzip): fix reportIncompatibleMethodOverride lints

This check is currently turned off in our `basic` `typeCheckingMode`
profile, but is enabled in the `standard` profile.

Things done here:

- instead of incompatible overriding `read`, added a new `read_all`
  method, to better express the functionality of that method

Error:

    unblob/handlers/compression/_gzip_reader.py
      unblob/handlers/compression/_gzip_reader.py:18:9 - error: Method "read" overrides class "DecompressReader" in an incompatible manner
        Positional parameter count mismatch; base method has 2, but override has 1
        Parameter 2 mismatch: base parameter "size" is keyword parameter, override parameter is position-only (reportIncompatibleMethodOverride)

Author: vlaci

unblob/handlers/compression/_gzip_reader.py

@@ -15,7 +15,7 @@ def _add_read_data(self, data):
         self._crc = zlib.crc32(data, self._crc)
         self._stream_size = self._stream_size + len(data)
 
-    def read(self):
+    def read_all(self):
         uncompress = b""
 
         while True:
@@ -39,7 +39,7 @@ def read(self):
 
     def read_until_eof(self):
         while not self._decompressor.eof:
-            self.read()
+            self.read_all()
 
     @property
     def unused_data(self):