Tweak sensor value setter unit test params

As per @bmerry's suggestion on #98.

Contributes to: NGC-1062.

tests/test_sensor.py

@@ -100,9 +100,9 @@ class OtherEnum(enum.Enum):
     "sensor_type,compatible_value",
     [
         (bool, True),
-        (int, 1_2_3_4),
-        (float, Fraction(1234678)),
-        (float, Fraction(12345678)),
+        (int, 1234),
+        (float, 1234.5),
+        (float, Fraction(8190 / 64)),
         (str, "one-two-three-four"),
         (bytes, b"one-two-three-four"),
         (Address, Address(IPv4Address("1.2.3.4"))),
@@ -138,7 +138,7 @@ def test_sensor_value_setter_success(
         (bool, "True"),
         (int, "1234"),
         (int, 1234.5),
-        (float, "1234.5"),
+        (float, 1 + 2j),
         (str, {"a": 1}),
         (str, b"bytes"),
         (bytes, "str"),