v0.2.3

• Bug fix: Fixed incorrect buffer expansion logic (#1; Thanks @whc2001 !)
• Bug fix: NullReferenceException when writing previously non-existent keyed value to LTable. E.g.

var table = new LTable();
table[12] = 345;           // NullReferenceException
table["key"] = "value";    // NullReferenceException

• Add .NET 6.0 targeting framework support.