fix(deps): update dependency rxjs to ^6.5.4

Author: renovate-bot

package.json

@@ -76,7 +76,7 @@
   "dependencies": {
     "@sourcegraph/vscode-ws-jsonrpc": "^0.0.3-fork",
     "lodash": "^4.17.15",
-    "rxjs": "^6.4.0",
+    "rxjs": "^6.5.4",
     "sourcegraph": "^23.1.0",
     "type-zoo": "^3.2.1",
     "uuid": "^3.3.2",

yarn.lock

@@ -5257,10 +5257,10 @@ rxjs-tslint-rules@^4.23.0:
     tsutils "^3.0.0"
     tsutils-etc "^1.1.0"
 
-rxjs@^6.4.0, rxjs@^6.5.1:
-  version "6.5.1"
-  resolved "https://registry.npmjs.org/rxjs/-/rxjs-6.5.1.tgz#f7a005a9386361921b8524f38f54cbf80e5d08f4"
-  integrity sha512-y0j31WJc83wPu31vS1VlAFW5JGrnGC+j+TtGAa1fRQphy48+fDYiDmX8tjGloToEsMkxnouOg/1IzXGKkJnZMg==
+rxjs@^6.5.1, rxjs@^6.5.4:
+  version "6.5.4"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.5.4.tgz#e0777fe0d184cec7872df147f303572d414e211c"
+  integrity sha512-naMQXcgEo3csAEGvw/NydRA0fuS2nDZJiw1YUWFKU7aPPAPGZEsD4Iimit96qwCieH6y614MCLYwdkrWx7z/7Q==
   dependencies:
     tslib "^1.9.0"