chore(deps): update nest monorepo to v7

Author: renovate-bot

package.json

@@ -14,9 +14,9 @@
     "coveralls": "cat ./coverage/lcov.info | coveralls"
   },
   "devDependencies": {
-    "@nestjs/common": "6.5.3",
-    "@nestjs/core": "6.5.3",
-    "@nestjs/testing": "6.5.3",
+    "@nestjs/common": "7.6.15",
+    "@nestjs/core": "7.6.15",
+    "@nestjs/testing": "7.6.15",
     "@types/jest": "24.0.16",
     "@types/node": "12.6.8",
     "@types/orbit-db": "https://github.com/orbitdb/orbit-db-types.git",
@@ -33,7 +33,7 @@
     "typescript": "3.5.3"
   },
   "peerDependencies": {
-    "@nestjs/core": "^6.5.3",
+    "@nestjs/core": "^7.0.0",
     "orbit-db": "^0.21.3",
     "reflect-metadata": "^0.1.13",
     "rxjs": "^6.5.2"