Bug with metric_min_improvement_discharge being changed to integer (#…

…1733)

* Bug with metric_min_improvement_discharge being changed to integer

#1731

* [pre-commit.ci lite] apply automatic fixes

* Merge

---------

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

apps/predbat/config.py

@@ -321,7 +321,7 @@
         "unit": "p",
         "icon": "mdi:currency-usd",
         "enable": "expert_mode",
-        "default": 5,
+        "default": 5.0,
     },
     {
         "name": "metric_battery_cycle",

apps/predbat/predbat.py

@@ -38,7 +38,7 @@
 import asyncio
 import json
 
-THIS_VERSION = "v8.8.6"
+THIS_VERSION = "v8.8.7"
 
 # fmt: off
 PREDBAT_FILES = ["predbat.py", "config.py", "prediction.py", "gecloud.py","utils.py", "inverter.py", "ha.py", "download.py", "unit_test.py", "web.py", "predheat.py", "futurerate.py", "octopus.py", "solcast.py","execute.py", "plan.py", "fetch.py", "output.py", "userinterface.py"]