Enabled declarations in tsconfig to be true

ts/numbering/level.ts

@@ -56,7 +56,7 @@ class LevelJc extends XmlComponent {
     }
 }
 
-class LevelBase extends XmlComponent {
+export class LevelBase extends XmlComponent {
     private paragraphProperties: ParagraphProperties;
     private runProperties: RunProperties;
 

ts/numbering/num.ts

@@ -42,7 +42,7 @@ class LevelOverrideAttributes extends XmlAttributeComponent<{ilvl: number}> {
     protected xmlKeys = {ilvl: "w:ilvl"};
 }
 
-class LevelOverride extends XmlComponent {
+export class LevelOverride extends XmlComponent {
     private levelNum: number;
     private lvl?: LevelForOverride;