Fix IncludeAll missing on nuget

Change to version 4.1.3

Fix index DateTime litedb-org#922

Partial fix DateTime UTC/Local in index key litedb-org#921

Version 4.1.1

Fix demo example

Fixing csproj to v4

Nuget for beta 2

Merge branch 'master' of github.com:mbdavid/LiteDB

Fix decimal index litedb-org#693