Update bulma.sass file

Author: emre-kaya

src/bulma-stubs/bulma.sass

@@ -11,11 +11,7 @@
 
 /* custom modified path import of utilities */
 @import "initial-variables.sass"
-@import "node_modules/bulma/sass/utilities/functions.sass"
-@import "node_modules/bulma/sass/utilities/derived-variables.sass"
-@import "node_modules/bulma/sass/utilities/animations.sass"
-@import "node_modules/bulma/sass/utilities/mixins.sass"
-@import "node_modules/bulma/sass/utilities/controls.sass"
+@import "node_modules/bulma/sass/utilities/_all"
 
 
 /* modified path import of other modules */