Add masked-mods support (PR#1114)

config/base.keymap

@@ -114,6 +114,7 @@ TODOs and ISSUES
             #binding-cells = <0>;
             bindings = <&lt NUM BSPC>, <&kp DEL>;
             mods = <MOD_LSFT>;
+            masked_mods = <MOD_LSFT>;  // requires PR 1114
         };
 
         // tap: sticky shift | double tap: capsword

config/west.yml

@@ -2,10 +2,12 @@ manifest:
   remotes:
     - name: zmkfirmware
       url-base: https://github.com/zmkfirmware
+    - name: urob
+      url-base: https://github.com/urob
   projects:
     - name: zmk
-      remote: zmkfirmware
-      revision: main
+      remote: urob
+      revision: masked-mods
       import: app/west.yml
   self:
     path: config