Fix jszip build error

ERROR in ./node_modules/jszip/lib/readable-stream-browser.js
Module not found: Error: Can't resolve 'stream' in '/home/niklas/Projekte/finanztopf/node_modules/jszip/lib'
[ERROR] An error occurred while running subprocess ng.

DevExpress/devextreme-angular#776

tsconfig.json

@@ -17,7 +17,12 @@
     "lib": [
       "es2018",
       "dom"
-    ]
+    ],
+    "paths": {
+      "jszip": [
+        "node_modules/jszip/dist/jszip.min.js"
+      ]
+    }
   },
   "angularCompilerOptions": {
     "fullTemplateTypeCheck": true,