Update SQLAlchemy, Flask, Flask-SQLAlchemy, and other packages to current versions. #5901

- Update Flask, Flask-SQLAlchemy, Flask-Babel, Flask-Security-Too, Flask-SocketIO, pytz, psutil, SQLAlchemy, bcrypt, cryptography, eventlet, Authlib, requests python packages
- Remove pinned dnspython, Werkzeug packages from requirements.txt

web/pgAdmin4.py

@@ -40,10 +40,6 @@ if (3, 10) > sys.version_info > (3, 8) and os.name == 'posix':
     # This was causing issue in psycopg3
     from eventlet import hubs
     hubs.use_hub("poll")
-    # Ref: https://github.com/miguelgrinberg/python-socketio/issues/567
-    # Resolve BigAnimal API issue
-    import selectors
-    selectors.DefaultSelector = selectors.PollSelector
 
 import config
 import setup
@@ -101,7 +97,6 @@ if not os.path.isfile(config.SQLITE_PATH):
 # it can be imported
 ##########################################################################
 app = create_app()
-app.debug = False
 app.config['sessions'] = dict()
 
 if setup_db_required:
@@ -163,22 +158,6 @@ def main():
             setattr(sys, _name,
                     open(os.devnull, 'r' if _name == 'stdin' else 'w'))
 
-    # Build Javascript files when DEBUG
-    if config.DEBUG:
-        from pgadmin.utils.javascript.javascript_bundler import \
-            JavascriptBundler, JsState
-        app.debug = True
-
-        javascript_bundler = JavascriptBundler()
-        javascript_bundler.bundle()
-        if javascript_bundler.report() == JsState.NONE:
-            app.logger.error(
-                "Unable to generate javascript.\n"
-                "To run the app ensure that yarn install command runs "
-                "successfully"
-            )
-            raise RuntimeError("No generated javascript, aborting")
-
     # Output a startup message if we're not under the runtime and startup.
     # If we're under WSGI, we don't need to worry about this
     if not app.PGADMIN_RUNTIME:
@@ -213,19 +192,19 @@ def main():
             app.run(
                 host=config.DEFAULT_SERVER,
                 port=config.EFFECTIVE_SERVER_PORT,
+                debug=config.DEBUG,
                 use_reloader=(
-                    (not app.PGADMIN_RUNTIME) and app.debug and
+                    (not app.PGADMIN_RUNTIME) and
                     os.environ.get("WERKZEUG_RUN_MAIN") is not None
                 ),
                 threaded=config.THREADED_MODE
             )
         else:
-            # Can use cheroot instead of flask dev server when not in debug
-            # 10 is default thread count in CherootServer
-            # num_threads = 10 if config.THREADED_MODE else 1
             try:
                 socketio.run(
                     app,
+                    debug=config.DEBUG,
+                    allow_unsafe_werkzeug=True,
                     host=config.DEFAULT_SERVER,
                     port=config.EFFECTIVE_SERVER_PORT,
                 )