Apply override only for flask-compress >= 1.6.0

Author: Marc-André Rivet

Diff for: dash/dash.py

@@ -1,5 +1,6 @@
 from __future__ import print_function
 
+
 import os
 import sys
 import collections
@@ -20,6 +21,7 @@
 import flask
 from flask_compress import Compress
 from werkzeug.debug.tbtools import get_current_traceback
+from pkg_resources import get_distribution, parse_version
 
 import plotly
 import dash_renderer
@@ -49,6 +51,8 @@
 from . import _validate
 from . import _watch
 
+flask_compress_version = parse_version(get_distribution("flask-compress").version)
+
 # Add explicit mapping for map files
 mimetypes.add_type("application/json", ".map", True)
 
@@ -280,7 +284,9 @@ def __init__(
         elif isinstance(server, bool):
             name = name if name else "__main__"
             self.server = flask.Flask(name) if server else None
-            if self.server is not None:
+            if self.server is not None and flask_compress_version >= parse_version(
+                "1.6.0"
+            ):
                 # flask-compress==1.6.0 changed default to ['br', 'gzip']
                 # and non-overridable default compression with Brotli is
                 # causing performance issues