Use deep imports for date-fns to improve tree-shaking

Change-type: patch
See: https://balena.zulipchat.com/#narrow/stream/346007-balena-io.2FbalenaCloud/topic/moment.20-.3E.20date-fns
Signed-off-by: Thodoris Greasidis <thodoris@balena.io>

lib/util/date.ts

@@ -1,4 +1,6 @@
-import { formatDistance } from 'date-fns';
+// TODO: Remvove the deep imports once we start offering an esm build
+// and confirm that tree-shaking date-fns still works.
+import formatDistance from 'date-fns/formatDistance';
 import * as memoizee from 'memoizee';
 
 const now = memoizee(() => new Date(), { maxAge: 1000 });

tslint.json

@@ -1,6 +1,10 @@
 {
 	"extends": "./node_modules/@balena/lint/config/tslint-prettier.json",
 	"rules": {
-		"import-blacklist": [true, "lodash"]
+		"import-blacklist": [
+			true,
+			"date-fns",
+			"lodash"
+		]
 	}
 }