Small cleanup

- Updated the changelog
- Changed `pip` to `pip3` in the Readme, because some people still have
  `pip` linked to versions less than Python 3
- Improved a type hint

CHANGELOG.md

@@ -9,6 +9,9 @@ version is necessary for the script to adapt to these changes (and expect more p
 
 ### New Features
 - An official ARMv7 Docker image is now supported ([#77](https://github.com/jdholtz/auto-southwest-check-in/issues/77))
+- Healthchecks.io integration is added to monitor for successes and failures during fare checking
+([#203](https://github.com/jdholtz/auto-southwest-check-in/pull/203) by [@StevenMassaro](https://github.com/StevenMassaro))
+    - For details on how to set this integration up, see the [configuration documentation](CONFIGURATION.md#healthchecks-url)
 
 ### Bug Fixes
 - Fix passwords not being input correctly into Southwest's login page

README.md

@@ -34,7 +34,7 @@ cd auto-southwest-check-in
 ```
 Then, install the needed packages for the script
 ```shell
-pip install -r requirements.txt
+pip3 install -r requirements.txt
 ```
 You may want to install the requirements in a [Python virtual environment][3] to ensure they don't conflict
 with other Python projects on your system.

lib/reservation_monitor.py

@@ -2,10 +2,10 @@
 import sys
 import time
 from datetime import datetime
-from typing import Any, Dict, List, Tuple
+from typing import Any, Dict, List, Tuple, Union
 
 from .checkin_scheduler import CheckInScheduler
-from .config import AccountConfig, Config
+from .config import AccountConfig, ReservationConfig
 from .fare_checker import FareChecker
 from .log import get_logger
 from .notification_handler import NotificationHandler
@@ -23,7 +23,9 @@ class ReservationMonitor:
     check-ins, flight changes or cancellations, and lower flight fares.
     """
 
-    def __init__(self, config: Config, lock: multiprocessing.Lock = None) -> None:
+    def __init__(
+        self, config: Union[AccountConfig, ReservationConfig], lock: multiprocessing.Lock = None
+    ) -> None:
         self.first_name = config.first_name
         self.last_name = config.last_name