test: use flokki for parsing html in ~X tests

Summary:
Flokki is pretty well tested so we can use it and remove one dependency
if we normalize html attribute ordering for tests.

Test Plan:

```sh
mix test
```

mix.exs

@@ -44,7 +44,6 @@ defmodule Phoenix.LiveView.MixProject do
       {:telemetry, "~> 0.4.2 or ~> 1.0"},
       {:jason, "~> 1.0", optional: true},
       {:floki, "~> 0.30.0", only: :test},
-      {:easyhtml, "~> 0.3.0", only: :test},
       {:ex_doc, "~> 0.29", only: :docs},
       {:makeup_eex, ">= 0.1.1", only: :docs},
       {:html_entities, ">= 0.0.0", only: :test},

mix.lock

@@ -1,7 +1,6 @@
 %{
   "castore": {:hex, :castore, "1.0.3", "7130ba6d24c8424014194676d608cb989f62ef8039efd50ff4b3f33286d06db8", [:mix], [], "hexpm", "680ab01ef5d15b161ed6a95449fac5c6b8f60055677a8e79acf01b27baa4390b"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.33", "3c3fd9673bb5dcc9edc28dd90f50c87ce506d1f71b70e3de69aa8154bc695d44", [:mix], [], "hexpm", "2d526833729b59b9fdb85785078697c72ac5e5066350663e5be6a1182da61b8f"},
-  "easyhtml": {:hex, :easyhtml, "0.3.0", "80e729ab4bfa7572fda74d05d7e8fb6b2e01b9d828a44e75e563d0e1a258eca7", [:mix], [{:floki, "~> 0.30", [hex: :floki, repo: "hexpm", optional: false]}], "hexpm", "9929ef5c0e85812f1d6ce66587597fe81a825ae9653bb851e942ceff45123afe"},
   "esbuild": {:hex, :esbuild, "0.7.1", "fa0947e8c3c3c2f86c9bf7e791a0a385007ccd42b86885e8e893bdb6631f5169", [:mix], [{:castore, ">= 0.0.0", [hex: :castore, repo: "hexpm", optional: false]}], "hexpm", "66661cdf70b1378ee4dc16573fcee67750b59761b2605a0207c267ab9d19f13c"},
   "ex_doc": {:hex, :ex_doc, "0.30.4", "e8395c8e3c007321abb30a334f9f7c0858d80949af298302daf77553468c0c39", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "9a19f0c50ffaa02435668f5242f2b2a61d46b541ebf326884505dfd3dd7af5e4"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},

test/support/html.ex

@@ -1,19 +1,51 @@
 defmodule Phoenix.LiveViewTest.HTML do
-  require EasyHTML
-
   defmacro sigil_X({:<<>>, _, [binary]}, []) when is_binary(binary) do
-    Macro.escape(EasyHTML.parse!(binary))
+    Macro.escape(parse_sorted!(binary))
   end
 
   defmacro sigil_x(term, []) do
     quote bind_quoted: [term: term] do
-      EasyHTML.parse!(term)
+      parse_sorted!(term)
     end
   end
 
   def t2h(template) do
     template
     |> Phoenix.LiveViewTest.rendered_to_string()
-    |> EasyHTML.parse!()
+    |> parse_sorted!()
   end
+
+  @doc """
+  This function will parse a binary into a list of in the format
+  of floki, however the attributes of any node are in sorted
+  order.
+
+  ```
+  {"node_name", [{"attribute_name", "attribute_value"}], [content]}
+  ```
+
+  or
+
+  ```
+  "string contents with no html/xml nodes"
+  ```
+
+  While soting the html attributes does mean we can't detect
+  differences in behavior, it also keeps the order of map
+  key/value from failing tests.
+
+  """
+  def parse_sorted!(value) do
+    value
+    |> Floki.parse_fragment!()
+    |> Enum.map(&normalize_attribute_order/1)
+  end
+
+  defp normalize_attribute_order({node_type, attributes, content}),
+    do: {node_type, Enum.sort(attributes), Enum.map(content, &normalize_attribute_order/1)}
+
+  defp normalize_attribute_order(values) when is_list(values),
+    do: Enum.map(values, &normalize_attribute_order/1)
+
+  defp normalize_attribute_order(value), do: value
 end