Sync with wfrp 4, v8.4.0

module/models/protagonist.mjs

@@ -178,6 +178,17 @@ export default class CthulhuEternalProtagonist extends foundry.abstract.TypeData
     return this.wp.exhausted
   }
 
+  modifyWP(value) {
+    let updates = {}
+    let wp = Math.max(Math.min(this.wp.value + value, this.wp.max), 0)
+    if ( this.wp.value !== wp) {
+      updates[`system.wp.value`] = wp
+    }
+    if (Object.keys(updates).length > 0) {
+      this.parent.update(updates)
+    }
+  }
+
   setBP() {
     let updates = {}
     let bp = Math.max(this.san.value - this.characteristics.pow.value, 0)