⬆️ Update simplecov to version 0.18.5 (#81)

Co-authored-by: depfu[bot] <23717796+depfu[bot]@users.noreply.github.com>

Author: depfu[bot]

Gemfile.lock

@@ -39,7 +39,7 @@ GEM
     public_suffix (4.0.3)
     rake (13.0.1)
     ruby-progressbar (1.10.1)
-    simplecov (0.18.2)
+    simplecov (0.18.5)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
     simplecov-html (0.12.2)