fix(deps): update dependency rxjs to v7

package.json

@@ -32,7 +32,7 @@
   "dependencies": {
     "express": "4.17.1",
     "node-fetch": "2.6.1",
-    "rxjs": "6.6.7",
+    "rxjs": "7.8.0",
     "socket.io": "2.4.1",
     "webpack-dev-server": "3.11.2",
     "xhr2": "0.2.1"

yarn.lock

@@ -8606,12 +8606,12 @@ run-queue@^1.0.0, run-queue@^1.0.3:
   dependencies:
     aproba "^1.1.1"
 
-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==
+rxjs@7.8.0:
+  version "7.8.0"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-7.8.0.tgz#90a938862a82888ff4c7359811a595e14e1e09a4"
+  integrity sha512-F2+gxDshqmIub1KdvZkaEfGDwLNpPvk9Fs6LD/MyQxNgMds/WH9OdDDXOmxUZpME+iSK3rQCctkL0DYyytUqMg==
   dependencies:
-    tslib "^1.9.0"
+    tslib "^2.1.0"
 
 rxjs@^6.4.0:
   version "6.4.0"
@@ -9888,6 +9888,11 @@ tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"
   integrity sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==
 
+tslib@^2.1.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.5.0.tgz#42bfed86f5787aeb41d031866c8f402429e0fddf"
+  integrity sha512-336iVw3rtn2BUK7ORdIAHTyxHGRIHVReokCR3XjbckJMK7ms8FysBfhLR8IXnAgy7T0PTPNBWKiH514FOW/WSg==
+
 [email protected]:
   version "5.17.0"
   resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.17.0.tgz#f9f0ce2011d8e90debaa6e9b4975f24cd16852b8"