SQLitePCL.raw is a Portable Class Library (PCL) for low-level (raw) access to SQLite. Packages named 'SQLitePCLRaw.provider.*' (like this one) are 'plugins' that allow SQLitePCLRaw.core to access the native SQLite library. This provider dynamically loads the native library by name.
Install-Package SQLitePCLRaw.provider.dynamic -Version 2.0.0-pre20190625090255