Revamp (#83)

* See CHANGELOG for v3.0.0

* removed get-stream

* enabled linter just for test.js & from.js

* Any blob part is acceptable (jsdoc)
since the default fallback is to cast unknown items into strings

* async stat version

* import from fs/promise instead

* Updated the Readme and code examples

* known differences, buffer.Blob support, private stream, more test

* require node 14

* use fetch v3

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
-        node: ["15", "14", "12", engines]
+        node: ["16", "15", "14", engines]
         exclude:
           # On Windows, run tests with only the LTS environments.
           - os: windows-latest