remove unnecessary deps

package-lock.json

@@ -44,10 +44,9 @@
         "typescript": "^4.6.4"
       },
       "peerDependencies": {
-        "@nestjs/common": "^8.4.6",
-        "@nestjs/core": "^8.4.6",
-        "koishi": "^4.7.2",
-        "rxjs": "^7.5.4"
+        "@nestjs/common": "^8.0.0",
+        "@nestjs/core": "^8.0.0",
+        "koishi": "^4.7.2"
       }
     },
     "node_modules/@babel/code-frame": {

package.json

@@ -31,10 +31,9 @@
   "author": "Nanahira <nanahira@momobako.com>",
   "license": "MIT",
   "peerDependencies": {
-    "@nestjs/common": "^8.4.6",
-    "@nestjs/core": "^8.4.6",
-    "koishi": "^4.7.2",
-    "rxjs": "^7.5.4"
+    "@nestjs/common": "^8.0.0",
+    "@nestjs/core": "^8.0.0",
+    "koishi": "^4.7.2"
   },
   "devDependencies": {
     "@nestjs/platform-express": "^8.4.6",