Only compile history_custom example if history feature is enabled

Author: francisdb

Cargo.toml

@@ -43,6 +43,10 @@ required-features = ["fuzzy-select"]
 name = "history"
 required-features = ["history"]
 
+[[example]]
+name = "history_custom"
+required-features = ["history"]
+
 [[example]]
 name = "completion"
 required-features = ["completion"]