Update dependency minitest-rails to v8

Author: renovate[bot]

Gemfile.lock

@@ -119,7 +119,7 @@ GEM
     builder (3.3.0)
     climate_control (1.2.0)
     concurrent-ruby (1.3.5)
-    connection_pool (2.5.0)
+    connection_pool (2.5.3)
     crack (1.0.0)
       bigdecimal
       rexml
@@ -200,7 +200,7 @@ GEM
       concurrent-ruby (~> 1.0)
     io-console (0.8.0)
     ipaddr_range_set (1.0.0)
-    irb (1.15.1)
+    irb (1.15.2)
       pp (>= 0.6.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
@@ -220,7 +220,7 @@ GEM
     llhttp-ffi (0.5.1)
       ffi-compiler (~> 1.0)
       rake (~> 13.0)
-    logger (1.6.6)
+    logger (1.7.0)
     lograge (0.14.0)
       actionpack (>= 4)
       activesupport (>= 4)
@@ -270,17 +270,17 @@ GEM
     pp (0.6.2)
       prettyprint
     prettyprint (0.2.0)
-    psych (5.2.3)
+    psych (5.2.4)
       date
       stringio
     public_suffix (6.0.1)
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.12)
+    rack (3.1.14)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)
-    rack-session (2.1.0)
+    rack-session (2.1.1)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.2.0)
@@ -321,10 +321,10 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rdoc (6.12.0)
+    rdoc (6.13.1)
       psych (>= 4.0.0)
     regexp_parser (2.10.0)
-    reline (0.6.0)
+    reline (0.6.1)
       io-console (~> 0.5)
     representable (3.2.0)
       declarative (< 0.1.0)
@@ -398,7 +398,7 @@ GEM
       mini_portile2 (~> 2.8.0)
     statsd-ruby (1.5.0)
     stringex (2.8.6)
-    stringio (3.1.5)
+    stringio (3.1.7)
     terser (1.2.5)
       execjs (>= 0.3.0, < 3)
     thor (1.3.2)