Add unit tests on Login component

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/package.json

@@ -28,7 +28,6 @@
     "bulma-divider": "^0.2.0",
     "core-js": "^3.6.4",
     "date-fns": "^2.16.0",
-    "eslint-plugin-cypress": "^2.10.3",
     "graphql": "^15.0.0",
     "graphql-tag": "^2.10.3",
     "intersection-observer": "^0.12.0",
@@ -80,9 +79,11 @@
     "@vue/test-utils": "^1.1.0",
     "eslint": "^6.7.2",
     "eslint-config-prettier": "^7.0.0",
+    "eslint-plugin-cypress": "^2.10.3",
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-prettier": "^3.1.3",
-    "eslint-plugin-vue": "^7.0.0",
+    "eslint-plugin-vue": "^7.9.0",
+    "flush-promises": "^1.0.2",
     "jest-junit": "^12.0.0",
     "mock-apollo-client": "^0.6",
     "prettier": "2.2.1",