Merge branch 'add-missing-columns-ecosystem' into 'master'

Add missing attributes for Ecosystem firestore schema

See merge request !77

src/types/firestore/ecosystemFollow.ts

+export type IEcosystemFollow = {
+  id?: string;
+  userId: string;
+  ecosystemId: string;
+};

src/types/firestore/ecosystems.ts

+import firebase from "firebase/app";
+
 export type IEcosystem = {
   id?: string;
+  creatorId: string;
   name: string;
   description: string;
   categoryId: string;
   pic: string;
   rating: number;
   raters: number;
+  timestamp: firebase.firestore.Timestamp;
   followerCount: number;
   visibility: "private" | "protected" | "public";
 };