Add constructor for the DistanceMatrix class

- `DistanceMatrix.from_addresses()` takes a variable number of
  `Address` objects and creates distance matrix entries for them
- as a base measure, the air distance between two `Address`
  objects is calculated
- in addition, an integration with the Google Maps Directions API is
  implemented that provides a more realistic measure of the distance
  and duration a rider on a bicycle would need to travel between two
  `Address` objects
- add a `Location.lat_lng` convenience property that provides the
  `.latitude` and `.longitude` of an `Address` as a 2-`tuple`

setup.cfg

@@ -144,6 +144,9 @@ per-file-ignores =
     src/urban_meal_delivery/console/forecasts.py:
         # The module is not too complex.
         WPS232,
+    src/urban_meal_delivery/db/addresses_addresses.py:
+        # The module does not have too many imports.
+        WPS201,
     src/urban_meal_delivery/db/customers.py:
         # The module is not too complex.
         WPS232,
@@ -217,6 +220,7 @@ allowed-domain-names =
     obj,
     param,
     result,
+    results,
     value,
 max-name-length = 40
 # darglint
@@ -267,12 +271,18 @@ cache_dir = .cache/mypy
 
 [mypy-folium.*]
 ignore_missing_imports = true
+[mypy-geopy.*]
+ignore_missing_imports = true
+[mypy-googlemaps.*]
+ignore_missing_imports = true
 [mypy-matplotlib.*]
 ignore_missing_imports = true
 [mypy-nox.*]
 ignore_missing_imports = true
 [mypy-numpy.*]
 ignore_missing_imports = true
+[mypy-ordered_set.*]
+ignore_missing_imports = true
 [mypy-packaging]
 ignore_missing_imports = true
 [mypy-pandas]