[Fix] V13 Migration Fixes (#2044)

* Fixed so that damageParts without an applyTo field is assumed to be hitPoints

* Added the applyTo field to the basic attack for Adversaries and Companions

* Tentative blindfix to issues of entities being null. Can't replicate it

* Added some safety for missing things if someone was on a REALLY old system version and then updated all the way

* Moved v13 countdown migration over to a migrateData

* .

module/data/actor/character.mjs

@@ -107,6 +107,7 @@ export default class DhCharacter extends DhCreature {
                         parts: {
                             hitPoints: {
                                 type: ['physical'],
+                                applyTo: 'hitPoints',
                                 value: {
                                     custom: {
                                         enabled: true,