use jszip from system

debian/patches/0420-use-system-libs.patch

@@ -16,7 +16,7 @@
      "cropper": "^2.3.0",
      "css-loader": "^0.28.0",
      "d3": "^3.5.11",
-@@ -30,17 +28,12 @@
+@@ -30,17 +28,11 @@
      "document-register-element": "^1.3.0",
      "dropzone": "^4.2.0",
      "emoji-unicode-version": "^0.2.1",
@@ -28,13 +28,13 @@
      "jquery": "^2.2.1",
      "jquery-ujs": "^1.2.1",
      "js-cookie": "^2.1.3",
-     "jszip": "^3.1.3",
+-    "jszip": "^3.1.3",
      "jszip-utils": "^0.0.2",
 -    "marked": "^0.3.6",
      "monaco-editor": "0.8.3",
      "mousetrap": "^1.4.6",
      "name-all-modules-plugin": "^1.0.1",
-@@ -48,7 +41,6 @@
+@@ -48,7 +40,6 @@
      "prismjs": "^1.6.0",
      "raphael": "^2.2.7",
      "raven-js": "^3.14.0",
@@ -42,7 +42,7 @@
      "react-dev-utils": "^0.5.2",
      "select2": "3.5.2-browserify",
      "sql.js": "^0.4.0",
-@@ -56,14 +48,12 @@
+@@ -56,14 +47,12 @@
      "three-orbit-controls": "^82.1.0",
      "three-stl-loader": "^1.0.4",
      "timeago.js": "^2.0.5",