Add BitIntegers compat (#100)

diff --git a/Project.toml b/Project.toml
index 10f4dbc..17a3be0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,6 +17,7 @@
 UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
 [compat]
+BitIntegers = "0.2"
 CodecLz4 = "0.4"
 CodecZstd = "0.7"
 DataAPI = "1"