Add typing for downloadObject

Changing from any type to a proper type reveals that the object can be
null in couple of places - non-null assertions are used for these to
avoid having to deal with these right now.

src/components/views/DownloadModModal.vue

@@ -114,6 +114,14 @@ import { Progress } from '../all';
 import Game from '../../model/game/Game';
 import ConflictManagementProvider from '../../providers/generic/installing/ConflictManagementProvider';
 
+interface DownloadProgress {
+    assignId: number;
+    initialMods: string[];
+    modName: string;
+    progress: number;
+    failed: boolean;
+}
+
 let assignId = 0;
 
     @Component({
@@ -124,12 +132,12 @@ let assignId = 0;
     export default class DownloadModModal extends Vue {
 
         versionNumbers: string[] = [];
-        downloadObject: any | null = null;
+        downloadObject: DownloadProgress | null = null;
         downloadingMod: boolean = false;
         selectedVersion: string | null = null;
         currentVersion: string | null = null;
 
-        static allVersions: [number, any][] = [];
+        static allVersions: [number, DownloadProgress][] = [];
 
         get activeGame(): Game {
             return this.$store.state.activeGame;
@@ -281,7 +289,7 @@ let assignId = 0;
                         assignId: currentAssignId,
                         failed: false,
                     }
-                    if (this.downloadObject.assignId === currentAssignId) {
+                    if (this.downloadObject!.assignId === currentAssignId) {
                         this.downloadObject = Object.assign({}, obj);
                     }
                     this.$set(DownloadModModal.allVersions, assignIndex, [currentAssignId, obj]);
@@ -322,7 +330,7 @@ let assignId = 0;
                             assignId: currentAssignId,
                             failed: false,
                         }
-                        if (this.downloadObject.assignId === currentAssignId) {
+                        if (this.downloadObject!.assignId === currentAssignId) {
                             this.downloadObject = Object.assign({}, obj);
                         }
                         this.$set(DownloadModModal.allVersions, assignIndex, [currentAssignId, obj]);