DEV: update rack-mini-profiler

DEV: update rack-mini-profiler

This gem update fixes an issue with upcoming Rails 6

(without this fix mini profiler will not work on rails 6 and simply renders text)

diff --git a/Gemfile.lock b/Gemfile.lock
index 716c4e9..9904a8f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -288,7 +288,7 @@ GEM
     puma (3.12.0)
     r2 (0.2.7)
     rack (2.0.6)
-    rack-mini-profiler (1.0.1)
+    rack-mini-profiler (1.0.2)
       rack (>= 1.2.0)
     rack-openid (1.3.1)
       rack (>= 1.1.0)

GitHub sha: 0098b307