Bump version to 0.8.1 (#61)

Author: Hiroaki Imoto

Project.toml

@@ -1,7 +1,7 @@
 name = "BioMASS"
 uuid = "324734c7-f323-4536-9335-775d9be9d101"
 authors = ["Hiroaki Imoto <himoto@protein.osaka-u.ac.jp>"]
-version = "0.8.0"
+version = "0.8.1"
 
 [deps]
 CSV = "336ed68f-0bac-5ca0-87d4-7b16caf5d00b"