fix(deps): update dependency rxjs to v7

Author: renovate[bot]

package.json

@@ -33,7 +33,7 @@
     "@nestjs/platform-express": "^7.4.4",
     "reflect-metadata": "^0.1.13",
     "rimraf": "^3.0.0",
-    "rxjs": "^6.6.3"
+    "rxjs": "^7.0.0"
   },
   "devDependencies": {
     "@nestjs/cli": "7.6.0",

yarn.lock

@@ -8672,13 +8672,20 @@ rxjs@6.6.3, rxjs@^6.6.0:
   dependencies:
     tslib "^1.9.0"
 
-rxjs@6.6.7, rxjs@^6.6.3:
+rxjs@6.6.7:
   version "6.6.7"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.6.7.tgz#90ac018acabf491bf65044235d5863c4dab804c9"
   integrity sha512-hTdwr+7yYNIT5n4AMYp85KA6yw2Va0FLa3Rguvbpa4W3I5xynaBZo41cM3XM+4Q6fRMj3sBYIR1VAmZMXYJvRQ==
   dependencies:
     tslib "^1.9.0"
 
+rxjs@^7.0.0:
+  version "7.8.1"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-7.8.1.tgz#6f6f3d99ea8044291efd92e7c7fcf562c4057543"
+  integrity sha512-AA3TVj+0A2iuIoQkWEK/tqFjBq2j+6PO6Y0zJcvzLAFhEFIO3HL0vls9hWLncZbAAbK0mar7oZ4V079I/qPMxg==
+  dependencies:
+    tslib "^2.1.0"
+
 safe-array-concat@^1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/safe-array-concat/-/safe-array-concat-1.1.2.tgz#81d77ee0c4e8b863635227c721278dd524c20edb"
@@ -9864,6 +9871,11 @@ tslib@^1.8.1, tslib@^1.9.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.14.1.tgz#cf2d38bdc34a134bcaf1091c41f6619e2f672d00"
   integrity sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==
 
+tslib@^2.1.0:
+  version "2.6.3"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.6.3.tgz#0438f810ad7a9edcde7a241c3d80db693c8cbfe0"
+  integrity sha512-xNvxJEOUiWPGhUuUdQgAJPKOOJfGnIyKySOc09XkKsgdUV/3E2zvwZYdejjmRgPCgcym1juLH3226yA7sEFJKQ==
+
 tsutils@^3.21.0:
   version "3.21.0"
   resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.21.0.tgz#b48717d394cea6c1e096983eed58e9d61715b623"