Bump version numbers

Make the Hub ready for its v0.4 release: Update its own version number and bump dependency versions (especially to fix vulnerabilities)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@openeo/hub",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "author": "openEO Consortium",
   "contributors": [
     {
@@ -34,14 +34,14 @@
     "@openeo/vue-components": "0.4.1",
     "axios": "^0.19.0",
     "moment": "^2.22.2",
-    "mongodb": "^3.1.10",
-    "restify": "^7.2.3",
+    "mongodb": "^3.5.2",
+    "restify": "^8.5.1",
     "vue": "^2.6.0",
     "vue-multiselect": "^2.1.6",
     "vue2-leaflet": "^1.2.3"
   },
   "devDependencies": {
-    "@vue/cli-service": "^3.7.0",
+    "@vue/cli-service": "^4.1.2",
     "vue-template-compiler": "^2.5.22"
   }
 }