Rewrite types

*   TS is now checking the whole code base and I’ve tested the types with several other unified* repos, which caught some small bugs
*   Removing superfluous overloads
*   Removed the type parameter `P` for processor settings
*   Rename the type parameter `S` to `PluginParameters`
*   Use `any[]` instead of `[Record<string, unknown>?]` for the default plugin type parameters

Closes GH-150.

Reviewed-by: Christian Murphy <christian.murphy.42@gmail.com>
Reviewed-by: Remco Haszing <remcohaszing@gmail.com>

.gitignore

@@ -1,5 +1,7 @@
-.DS_Store
-*.log
 coverage/
 node_modules/
+.DS_Store
+lib/**/*.d.ts
+test/**/*.d.ts
+*.log
 yarn.lock