Raise the lower-bound version number to julia 1.6. Bump our version to 0.4

Author: NHDaly

Project.toml

@@ -1,10 +1,10 @@
 name = "FixedPointDecimals"
 uuid = "fb4d412d-6eee-574d-9565-ede6634db7b0"
 authors = ["Fengyang Wang <fengyang.wang.0@gmail.com>", "Curtis Vogt <curtis.vogt@gmail.com>"]
-version = "0.3.1"
+version = "0.4.0"
 
 [compat]
-julia = "0.7, 1.0"
+julia = "1.6"
 
 [extras]
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"