refactor: update a few dev deps and convert to using type imports where possible (#2886)

* build: bump deps and add some new eslint rules

* refactor: run eslint --fix on code to convert to type imports where possible

server/api/externalapi.ts

@@ -1,6 +1,7 @@
-import axios, { AxiosInstance, AxiosRequestConfig } from 'axios';
+import type { AxiosInstance, AxiosRequestConfig } from 'axios';
+import axios from 'axios';
 import rateLimit from 'axios-rate-limit';
-import NodeCache from 'node-cache';
+import type NodeCache from 'node-cache';
 
 // 5 minute default TTL (in seconds)
 const DEFAULT_TTL = 300;