Bump minimum Julia to 1.2

`hasproperty` is required and only 1.2+

Author: sjkelly

Project.toml

@@ -14,7 +14,7 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 StaticArrays = "0.12,0.1"
 StructArrays = "0.3,0.4"
 Tables = "0.2, 1"
-julia = "1.1"
+julia = "1.2"
 IterTools = "1.3.0"
 
 [extras]