Updated derailed_benchmarks gem to v1.8.1

This also updates heapy gem to work with Ruby v3.0.

CHANGELOG:
https://github.com/schneems/derailed_benchmarks/blob/main/CHANGELOG.md

Gemfile.lock

@@ -228,17 +228,16 @@ GEM
       activerecord (>= 3.2.0, < 6.1)
     deprecation_toolkit (1.5.1)
       activesupport (>= 4.2)
-    derailed_benchmarks (1.7.0)
+    derailed_benchmarks (1.8.1)
       benchmark-ips (~> 2)
       get_process_mem (~> 0)
       heapy (~> 0)
       memory_profiler (~> 0)
-      mini_histogram (~> 0)
+      mini_histogram (>= 0.2.1)
       rack (>= 1)
       rake (> 10, < 14)
       ruby-statistics (>= 2.1)
       thor (>= 0.19, < 2)
-      unicode_plot (>= 0.0.4, < 1.0.0)
     device_detector (1.0.0)
     devise (4.7.3)
       bcrypt (~> 3.0)
@@ -309,7 +308,6 @@ GEM
       launchy (~> 2.1)
       mail (~> 2.7)
     encryptor (3.0.0)
-    enumerable-statistics (2.0.1)
     equalizer (0.0.11)
     erubi (1.9.0)
     escape_utils (1.2.1)
@@ -573,7 +571,8 @@ GEM
       hashie (>= 3.0)
     health_check (3.0.0)
       railties (>= 5.0)
-    heapy (0.1.4)
+    heapy (0.2.0)
+      thor
     hipchat (1.5.2)
       httparty
       mimemagic
@@ -707,7 +706,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2020.0512)
     mimemagic (0.3.5)
-    mini_histogram (0.1.3)
+    mini_histogram (0.3.1)
     mini_magick (4.10.1)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
@@ -1194,8 +1193,6 @@ GEM
       unf_ext
     unf_ext (0.0.7.7)
     unicode-display_width (1.7.0)
-    unicode_plot (0.0.4)
-      enumerable-statistics (>= 2.0.1)
     unicode_utils (1.4.0)
     unicorn (5.5.5)
       kgio (~> 2.6)