Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- `.github/ISSUE_TEMPLATE/bug_report.md`:
  Upstream added the `bug` label to bug reports.
  Did the same.
- `app/services/fan_out_on_write_service.rb`:
  Upstream put DMs back into timelines, glitch-soc was already doing it.
  Ignored upstream changes.

Gemfile

@@ -11,9 +11,6 @@ gem 'sprockets', '~> 3.7.2'
 gem 'thor', '~> 1.0'
 gem 'rack', '~> 2.2.3'
 
-gem 'thwait', '~> 0.2.0'
-gem 'e2mmap', '~> 0.1.0'
-
 gem 'hamlit-rails', '~> 0.2'
 gem 'pg', '~> 1.2'
 gem 'makara', '~> 0.4'
@@ -44,7 +41,7 @@ group :pam_authentication, optional: true do
 end
 
 gem 'net-ldap', '~> 0.16'
-gem 'omniauth-cas', '~> 1.1'
+gem 'omniauth-cas', '~> 2.0'
 gem 'omniauth-saml', '~> 1.10'
 gem 'omniauth', '~> 1.9'
 
@@ -127,7 +124,7 @@ group :test do
   gem 'rails-controller-testing', '~> 1.0'
   gem 'rspec-sidekiq', '~> 3.1'
   gem 'simplecov', '~> 0.19', require: false
-  gem 'webmock', '~> 3.9'
+  gem 'webmock', '~> 3.10'
   gem 'parallel_tests', '~> 3.3'
   gem 'rspec_junit_formatter', '~> 0.4'
 end
@@ -141,7 +138,7 @@ group :development do
   gem 'letter_opener', '~> 1.7'
   gem 'letter_opener_web', '~> 1.4'
   gem 'memory_profiler'
-  gem 'rubocop', '~> 0.93', require: false
+  gem 'rubocop', '~> 1.3', require: false
   gem 'rubocop-rails', '~> 2.8', require: false
   gem 'brakeman', '~> 4.10', require: false
   gem 'bundler-audit', '~> 0.7', require: false