Allow formatting integers (#591)

I’m removing the fast path for rendering Integers because I think it makes sense to be able to format Integers by overriding `format_object`.

.github/workflows/ci.yml

@@ -7,6 +7,7 @@ on:
 jobs:
   tests:
     strategy:
+      fail-fast: false
       matrix:
         os: ['ubuntu-latest', 'macos-latest']
         ruby-version:
@@ -20,8 +21,8 @@ jobs:
           - 'truffleruby-22.3'
           - 'truffleruby-head'
 
-          - 'jruby-9.4.0.0'
-          - 'jruby-head'
+          # - 'jruby-9.4.0.0'
+          # - 'jruby-head'
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -39,9 +40,6 @@ jobs:
       - name: Tests
         run: bundle exec sus
 
-      - name: GreenDots tests
-        run: bundle exec gd gd
-
   rubocop:
     runs-on: 'ubuntu-latest'
     steps:

.rubocop.yml

@@ -10,3 +10,6 @@ Style/ExplicitBlockArgument:
 
 Style/MixinUsage:
   Enabled: false
+
+Style/RedundantDoubleSplatHashBraces:
+  Enabled: false

lib/phlex/sgml.rb

@@ -259,7 +259,7 @@ def render?
 		# @return [String]
 		def format_object(object)
 			case object
-			when Float
+			when Float, Integer
 				object.to_s
 			end
 		end
@@ -338,8 +338,6 @@ def __text__(content)
 				@_context.target << ERB::Escape.html_escape(content)
 			when Symbol
 				@_context.target << ERB::Escape.html_escape(content.name)
-			when Integer
-				@_context.target << content.to_s
 			when nil
 				nil
 			else