Utilize UnityEditor.EditorApplication. applicationContentsPath

[StanleyGoldman]

Breakout of #617

• Utilize UnityEditor.EditorApplication. applicationContentsPath
  Octorun Js #599 (comment)

The code to obtain the Tools folder in Unity can be shorted to use UnityEditor.EditorApplication. applicationContentsPath

Unity/src/GitHub.Api/Platform/DefaultEnvironment.cs

Lines 141 to 145 in 0eb26a9

	if (!nodeJsExecutablePath.IsInitialized)
	{
	nodeJsExecutablePath = IsWindows
	? UnityApplication.Parent.Combine("Data", "Tools", "nodejs", "node.exe")
	: UnityApplication.Combine("Contents", "Tools", "nodejs", "node");