Multiple improvements

[alcuadrado]

Hey @rhlsthrm,

I made some improvements to the plugin, without introducing breaking changes.

They are:

• Changed changed how the config type is extended. Now the type-extensions are loaded automatically, and the config is resolved/normalized before the tasks get to execute.
• Updated the clean task, so that it doesn't delete local things when --global is used, and also simplified it.
• Simplified how the default config is applied.
• Upgraded Hardhat
• Fixed the tests
• Corrected the tests's gitignore
• Deleted some unnecessary files
• Prevent the test files from being included in the npm package.
• Updated the README
• Made the plugin load typechain right before using it. This means that this plugin won't make hardhat's startup slower :)
• Pass compile the quiet param, so that it doesn't print "Nothing to compile" anymore.

I also think that this plugin could override the compile task, so that calling typechain isn't required. This way you can keep your normal workflow and get the benefits of the plugin automatically. I think a --no-typechain param should be added, so that typechain errors don't prevent compilation. I didn't implement this because I wanted to get your opinion first.

Best Pato

[rhlsthrm]

I also think that this plugin could override the compile task, so that calling typechain isn't required. This way you can keep your normal workflow and get the benefits of the plugin automatically. I think a --no-typechain param should be added, so that typechain errors don't prevent compilation. I didn't implement this because I wanted to get your opinion first.

I like this idea @alcuadrado! I will implement this as a follow-up feature.