CodeIgniter v4.0.5 and v4.1.0 released

@korgoth Just to be clear: Composer only handles the equivalent of the **syestem** folder. Users installing via Composer methods will need to update files in the **app** folder the same as everyone else.
The team has worked very hard at not allowing any breaking changes. This means: nothing in **app** needs to be updated. Are there new versions of files in **app**, and is there some benefit to implementing them? Yes, and we are working on documenting those but the bottom line is: no major version, no breaking changes.

Re: BaseModel... splitting Model into its new class and BaseModel was to make room for future development on "NoSQL" databases. The current model had some restrictions by assuming a SQL-type database, so keeping those in place and going everything else to an abstract class gives us more room for future development. If you are a current user of the framework: keep using Model per usual, no changes necessary. You can consider this an "internal change" unless you've been dabbling in NoSQL databases for CodeIgniter 4.