Observe.js v1.1.0 - Huge code improvements!

• Improved the HTML testing files.
• Improved event assigning, and re-organized the code into separate files.
• The GUIDs generated now used the "crypto.randomUUID()" instead of the custom-built one (this is now RFC4122-compliant).
• Updated all the NPM packages to the latest versions.
• Moved all event assignments to use lambdas.
• Updates to the README files to make the features stand out.
• Added an ignore path for ".DS_Store" files when packing the NuGet package.
• Removed replicated conditions to check for DOM elements.
• Internal renames to reflect the correct return types.