Upgrade protocol-rack gem, remove workaround

Previously, having this gem at the latest version was causing problems when booting the app: https://github.com/socketry/protocol-rack/issues/20

This is no longer the case. Goodbye, workaround!

Gemfile

@@ -6,9 +6,6 @@ gem 'rails', '~> 8.0', '>= 8.0.1'
 # The HTTP server running the Rails instance.
 gem 'falcon', '~> 0.48.0'
 
-# HACK: Workaround for https://github.com/socketry/protocol-rack/issues/20
-gem 'protocol-rack', '~> 0.10.0', '< 0.11.0'
-
 # Our database is MySQL, in both development and production.
 gem 'mysql2', '~> 0.5.5'
 
@@ -56,15 +53,12 @@ gem 'rack-attack', '~> 6.7'
 # For testing emails in development.
 gem 'letter_opener', '~> 1.8', '>= 1.8.1', group: :development
 
-# For parallel API calls.
-gem 'parallel', '~> 1.23'
-
 # For miscellaneous HTTP requests.
 gem "addressable", "~> 2.8"
 
 # For advanced batching of many HTTP requests.
 gem "async", "~> 2.17", require: false
-gem "async-http", "~> 0.86.0", require: false
+gem "async-http", "~> 0.89.0", require: false
 gem "thread-local", "~> 1.1", require: false
 
 # For debugging.

Gemfile.lock

@@ -82,22 +82,22 @@ GEM
       public_suffix (>= 2.0.2, < 7.0)
     aes_key_wrap (1.1.0)
     ast (2.4.3)
-    async (2.26.0)
+    async (2.27.0)
       console (~> 1.29)
       fiber-annotation
-      io-event (~> 1.12)
+      io-event (~> 1.11)
       metrics (~> 0.12)
       traces (~> 0.15)
     async-container (0.24.0)
       async (~> 2.22)
-    async-http (0.86.0)
+    async-http (0.89.0)
       async (>= 2.10.2)
       async-pool (~> 0.9)
       io-endpoint (~> 0.14)
       io-stream (~> 0.6)
       metrics (~> 0.12)
-      protocol-http (~> 0.43)
-      protocol-http1 (>= 0.28.1)
+      protocol-http (~> 0.49)
+      protocol-http1 (~> 0.30)
       protocol-http2 (~> 0.22)
       traces (~> 0.10)
     async-http-cache (0.4.5)
@@ -171,7 +171,7 @@ GEM
       protocol-http (~> 0.31)
       protocol-rack (~> 0.7)
       samovar (~> 2.3)
-    faraday (2.13.3)
+    faraday (2.13.4)
       faraday-net_http (>= 2.0, < 3.5)
       json
       logger
@@ -197,7 +197,7 @@ GEM
       concurrent-ruby (~> 1.0)
     io-console (0.8.1)
     io-endpoint (0.15.2)
-    io-event (1.12.0)
+    io-event (1.12.1)
     io-stream (0.10.0)
     irb (1.15.2)
       pp (>= 0.6.0)
@@ -206,7 +206,7 @@ GEM
     jaro_winkler (1.6.1)
     jsbundling-rails (1.3.1)
       railties (>= 6.0.0)
-    json (2.13.0)
+    json (2.13.1)
     json-jwt (1.16.7)
       activesupport (>= 4.2)
       aes_key_wrap
@@ -286,7 +286,7 @@ GEM
     openssl (3.3.0)
     orm_adapter (0.5.0)
     parallel (1.27.0)
-    parser (3.3.8.0)
+    parser (3.3.9.0)
       ast (~> 2.4.1)
       racc
     pp (0.6.2)
@@ -304,8 +304,9 @@ GEM
     protocol-http2 (0.22.1)
       protocol-hpack (~> 1.4)
       protocol-http (~> 0.47)
-    protocol-rack (0.10.1)
-      protocol-http (~> 0.37)
+    protocol-rack (0.15.0)
+      io-stream (>= 0.10)
+      protocol-http (~> 0.43)
       rack (>= 1.0)
     psych (5.2.6)
       date
@@ -406,7 +407,7 @@ GEM
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
     rspec-support (3.13.4)
-    rubocop (1.78.0)
+    rubocop (1.79.0)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -414,8 +415,9 @@ GEM
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.45.1, < 2.0)
+      rubocop-ast (>= 1.46.0, < 2.0)
       ruby-progressbar (~> 1.7)
+      tsort (>= 0.2.0)
       unicode-display_width (>= 2.4.0, < 4.0)
     rubocop-ast (1.46.0)
       parser (>= 3.3.7.2)
@@ -482,7 +484,7 @@ GEM
       faraday (~> 2.0)
       faraday-follow_redirects
     sync (0.5.0)
-    temple (0.10.3)
+    temple (0.10.4)
     terser (1.2.6)
       execjs (>= 0.3.0, < 3)
     thor (1.4.0)
@@ -490,6 +492,7 @@ GEM
     tilt (2.6.1)
     timeout (0.4.3)
     traces (0.15.2)
+    tsort (0.2.0)
     turbo-rails (2.0.16)
       actionpack (>= 7.1.0)
       railties (>= 7.1.0)
@@ -533,7 +536,7 @@ DEPENDENCIES
   RocketAMF!
   addressable (~> 2.8)
   async (~> 2.17)
-  async-http (~> 0.86.0)
+  async-http (~> 0.89.0)
   bootsnap (~> 1.16)
   debug (~> 1.9.2)
   devise (~> 4.9, >= 4.9.2)
@@ -550,8 +553,6 @@ DEPENDENCIES
   omniauth (~> 2.1)
   omniauth-rails_csrf_protection (~> 1.0)
   omniauth_openid_connect (~> 0.7.1)
-  parallel (~> 1.23)
-  protocol-rack (~> 0.10.0, < 0.11.0)
   rack-attack (~> 6.7)
   rack-mini-profiler (~> 3.1)
   rails (~> 8.0, >= 8.0.1)