DEV: update dependencies and add notes about exceptions

Previously it was unclear why certain gems are being held back cause Gemfile
had no comment explaining it.

I tried to add some explanation from memory and remove some exceptions that
seemed to be superfluous.

This upgrades shoulda to latest, it appears to work once a couple of assertions
are removed

Also update http accept language used to auto detect language from http header
this is tested

Zeitwerk small update seems fine

Gemfile

@@ -14,8 +14,10 @@ if rails_master?
   gem 'arel', git: 'https://github.com/rails/arel.git'
   gem 'rails', git: 'https://github.com/rails/rails.git'
 else
-  # until rubygems gives us optional dependencies we are stuck with this
+  # NOTE: Until rubygems gives us optional dependencies we are stuck with this needing to be explicit
-  # bundle update actionmailer actionpack actionview activemodel activerecord activesupport railties
+  # this allows us to include the bits of rails we use without pieces we do not.
+  #
+  # To issue a rails update bump the version number here
   gem 'actionmailer', '6.0.1'
   gem 'actionpack', '6.0.1'
   gem 'actionview', '6.0.1'
@@ -36,18 +38,25 @@ gem 'mail', require: false
 gem 'mini_mime'
 gem 'mini_suffix'
 
-gem 'redis', '4.1.3'
+gem 'redis'
 gem 'redis-namespace'
 
+# NOTE: AM serializer gets a lot slower with recent updates
+# we used an old branch which is the fastest one out there
+# are long term goal here is to fork this gem so we have a
+# better maintained living fork
 gem 'active_model_serializers', '~> 0.8.3'
 
-gem 'onebox', '1.9.24'
+gem 'onebox'
 
-gem 'http_accept_language', '~>2.0.5', require: false
+gem 'http_accept_language', require: false
 
+# Ember related gems need to be pinned cause they control client side
+# behavior, we will push these versions up when upgrading ember
 gem 'ember-rails', '0.18.5'
 gem 'discourse-ember-source', '~> 3.10.0'
 gem 'ember-handlebars-template', '0.8.0'
+
 gem 'barber'
 
 gem 'message_bus'
@@ -66,7 +75,7 @@ gem 'aws-sdk-sns', require: false
 gem 'excon', require: false
 gem 'unf', require: false
 
-gem 'email_reply_trimmer', '~> 0.1'
+gem 'email_reply_trimmer'
 
 # Forked until https://github.com/toy/image_optim/pull/162 is merged
 # https://github.com/discourse/image_optim
@@ -92,7 +101,7 @@ gem 'oj'
 gem 'pg'
 gem 'mini_sql'
 gem 'pry-rails', require: false
-gem 'r2', '~> 0.2.5', require: false
+gem 'r2', require: false
 gem 'rake'
 
 gem 'thor', require: false
@@ -107,7 +116,10 @@ gem 'tilt', require: false
 
 gem 'execjs', require: false
 gem 'mini_racer'
+
+# TODO: determine why highline is being held back and upgrade to latest
 gem 'highline', '~> 1.7.0', require: false
+
 gem 'rack-protection' # security
 gem 'cbor', require: false
 gem 'cose', require: false
@@ -121,7 +133,7 @@ end
 
 group :test do
   gem 'webmock', require: false
-  gem 'fakeweb', '~> 1.3.0', require: false
+  gem 'fakeweb', require: false
   gem 'minitest', require: false
   gem 'simplecov', require: false
   gem "test-prof"
@@ -136,9 +148,15 @@ group :test, :development do
   gem 'fabrication', require: false
   gem 'mocha', require: false
   gem 'rb-fsevent', require: RUBY_PLATFORM =~ /darwin/i ? 'rb-fsevent' : false
+
+  # TODO determine if we can update this to 0.10, API changes happened
+  # we would like to upgrade it if possible
   gem 'rb-inotify', '~> 0.9', require: RUBY_PLATFORM =~ /linux/i ? 'rb-inotify' : false
+
+  # TODO once 4.0.0 is released upgrade to it, at time of writing 3.9.0 is latest
   gem 'rspec-rails', '4.0.0.beta2', require: false
-  gem 'shoulda-matchers', '~> 3.1', '>= 3.1.3', require: false
+
+  gem 'shoulda-matchers', require: false
   gem 'rspec-html-matchers'
   gem 'pry-nav'
   gem 'byebug', require: ENV['RM_INFO'].nil?
@@ -153,14 +171,8 @@ group :development do
   gem 'better_errors'
   gem 'binding_of_caller'
   gem 'yaml-lint'
-
-  # waiting on 2.7.5 per: https://github.com/ctran/annotate_models/pull/595
-  if rails_master?
-    gem 'annotate', git: 'https://github.com/ctran/annotate_models.git'
-  else
   gem 'annotate'
 end
-end
 
 # this is an optional gem, it provides a high performance replacement
 # to String#blank? a method that is called quite frequently in current
@@ -213,11 +225,13 @@ gem 'lz4-ruby', require: false, platform: :mri
 if ENV["IMPORT"] == "1"
   gem 'mysql2'
   gem 'redcarpet'
+
+  # NOTE: in import mode the version of sqlite can matter a lot, so we stick it to a specific one
   gem 'sqlite3', '~> 1.3', '>= 1.3.13'
   gem 'ruby-bbcode-to-md', git: 'https://github.com/nlalonde/ruby-bbcode-to-md'
   gem 'reverse_markdown'
   gem 'tiny_tds'
-  gem 'csv', '~> 3.0'
+  gem 'csv'
 end
 
 gem 'webpush', require: false

Gemfile.lock

@@ -145,7 +145,7 @@ GEM
     highline (1.7.10)
     hkdf (0.3.0)
     htmlentities (4.3.4)
-    http_accept_language (2.0.5)
+    http_accept_language (2.1.1)
     i18n (1.7.0)
       concurrent-ruby (~> 1.0)
     image_size (1.5.0)
@@ -375,8 +375,8 @@ GEM
     seed-fu (2.3.9)
       activerecord (>= 3.1)
       activesupport (>= 3.1)
-    shoulda-matchers (3.1.3)
+    shoulda-matchers (4.1.2)
-      activesupport (>= 4.0.0)
+      activesupport (>= 4.2.0)
     sidekiq (5.2.7)
       connection_pool (~> 2.2, >= 2.2.2)
       rack (>= 1.5.0)
@@ -420,7 +420,7 @@ GEM
       hkdf (~> 0.2)
       jwt (~> 2.0)
     yaml-lint (0.0.10)
-    zeitwerk (2.2.1)
+    zeitwerk (2.2.2)
 
 PLATFORMS
   ruby
@@ -452,13 +452,13 @@ DEPENDENCIES
   diffy
   discourse-ember-source (~> 3.10.0)
   discourse_image_optim
-  email_reply_trimmer (~> 0.1)
+  email_reply_trimmer
   ember-handlebars-template (= 0.8.0)
   ember-rails (= 0.18.5)
   excon
   execjs
   fabrication
-  fakeweb (~> 1.3.0)
+  fakeweb
   fast_blank
   fast_xor
   fast_xs
@@ -467,7 +467,7 @@ DEPENDENCIES
   gc_tracer
   highline (~> 1.7.0)
   htmlentities
-  http_accept_language (~> 2.0.5)
+  http_accept_language
   listen
   lograge
   logstash-event
@@ -499,14 +499,14 @@ DEPENDENCIES
   omniauth-oauth2
   omniauth-openid
   omniauth-twitter
-  onebox (= 1.9.24)
+  onebox
   openid-redis-store
   parallel_tests
   pg
   pry-nav
   pry-rails
   puma
-  r2 (~> 0.2.5)
+  r2
   rack-mini-profiler
   rack-protection
   rails_multisite
@@ -516,7 +516,7 @@ DEPENDENCIES
   rb-inotify (~> 0.9)
   rbtrace
   rchardet
-  redis (= 4.1.3)
+  redis
   redis-namespace
   rinku
   rotp
@@ -534,7 +534,7 @@ DEPENDENCIES
   sassc
   sassc-rails
   seed-fu
-  shoulda-matchers (~> 3.1, >= 3.1.3)
+  shoulda-matchers
   sidekiq
   simplecov
   sprockets-rails

spec/models/post_reply_spec.rb

@@ -7,9 +7,6 @@ describe PostReply do
   fab!(:post) { Fabricate(:post, topic: topic) }
   fab!(:other_post) { Fabricate(:post, topic: topic) }
 
-  it { is_expected.to belong_to :post }
-  it { is_expected.to belong_to :reply }
-
   context "validation" do
     it "should ensure that the posts belong in the same topic" do
       expect(PostReply.new(post: post, reply: other_post)).to be_valid