Update GoJS version (2.1.19) (#118)

* Update GoJS version

* Fix build

Author: Nicolas ERNY

.travis.yml

@@ -1,6 +1,5 @@
 language: node_js
 node_js:
-    - '8'
     - '10'
     - '12'
 sudo: false

package.json

@@ -27,15 +27,15 @@
     },
     "homepage": "https://github.com/xcomponent/react-gojs#readme",
     "devDependencies": {
-        "@types/enzyme": "^3.10.3",
+        "@types/enzyme": "^3.10.5",
         "@types/jest": "^24.0.17",
-        "@types/node": "^12.7.1",
-        "@types/react": "^16.9.1",
-        "@types/react-dom": "^16.8.5",
-        "coveralls": "^3.0.6",
-        "enzyme": "^3.10.0",
-        "enzyme-adapter-react-16": "^1.14.0",
-        "husky": "^3.0.3",
+        "@types/node": "^14.0.14",
+        "@types/react": "^16.9.41",
+        "@types/react-dom": "^16.9.8",
+        "coveralls": "^3.1.0",
+        "enzyme": "^3.11.0",
+        "enzyme-adapter-react-16": "^1.15.2",
+        "husky": "^4.2.5",
         "jest": "^24.8.0",
         "jest-canvas-mock": "^2.1.0",
         "prettier": "1.18.2",
@@ -47,10 +47,10 @@
         "tslint-config-prettier": "^1.18.0",
         "tslint-plugin-prettier": "^2.0.1",
         "tslint-react": "^4.0.0",
-        "typescript": "^3.5.3"
+        "typescript": "^3.9.5"
     },
     "dependencies": {
-        "gojs": "^2.0.15"
+        "gojs": "^2.1.19"
     },
     "peerDependencies": {
         "react": "16.x",

src/GojsDiagram.test.tsx

@@ -104,7 +104,9 @@ describe('<GojsDiagram />', () => {
                 left: 0,
                 x: 0,
                 y: 0,
-                toJSON: null,
+                toJSON: () => {
+                    console.log('test');
+                },
                 bottom: 0,
                 right: 0
             };