[Housekeeping] Bump Phoenix LiveView to 1.0.0 (#495)

* bumped liveview to 1.0.0

* Converted interpolation to new syntax

lib/pinchflat_web.ex

@@ -100,6 +100,7 @@ defmodule PinchflatWeb do
       import PinchflatWeb.CustomComponents.TextComponents
       import PinchflatWeb.CustomComponents.TableComponents
       import PinchflatWeb.CustomComponents.ButtonComponents
+      import Pinchflat.Utils.StringUtils, only: [double_brace: 1]
 
       alias Pinchflat.Settings
       alias Pinchflat.Utils.StringUtils