chore: replace err-code with CodeError (#70)

Replaces
[err-code](https://github.com/IndigoUnited/js-err-code/blob/master/index.js)
with
[CodeError](libp2p/js-libp2p-interfaces#314)

Related:
[js-libp2p#1269](libp2p/js-libp2p#1269)

Changes

- removes err-code from dependencies
- adds @libp2p/interfaces@3.2.0 to dependencies
- uses CodeError in place of err-code

package.json

@@ -179,10 +179,10 @@
     "@achingbrain/ip-address": "^8.1.0",
     "@libp2p/interface-connection": "^3.0.2",
     "@libp2p/interface-peer-store": "^1.2.1",
+    "@libp2p/interfaces": "^3.2.0",
     "@libp2p/logger": "^2.0.0",
     "@multiformats/multiaddr": "^11.0.0",
     "abortable-iterator": "^4.0.2",
-    "err-code": "^3.0.1",
     "is-loopback-addr": "^2.0.1",
     "it-stream-types": "^1.0.4",
     "private-ip": "^3.0.0",

src/ip-port-to-multiaddr.ts

@@ -1,6 +1,6 @@
 import { logger } from '@libp2p/logger'
 import { multiaddr } from '@multiformats/multiaddr'
-import errCode from 'err-code'
+import { CodeError } from '@libp2p/interfaces/errors'
 import { Address4, Address6 } from '@achingbrain/ip-address'
 
 const log = logger('libp2p:ip-port-to-multiaddr')
@@ -16,15 +16,15 @@ export const Errors = {
  */
 export function ipPortToMultiaddr (ip: string, port: number | string) {
   if (typeof ip !== 'string') {
-    throw errCode(new Error(`invalid ip provided: ${ip}`), Errors.ERR_INVALID_IP_PARAMETER) // eslint-disable-line @typescript-eslint/restrict-template-expressions
+    throw new CodeError(`invalid ip provided: ${ip}`, Errors.ERR_INVALID_IP_PARAMETER) // eslint-disable-line @typescript-eslint/restrict-template-expressions
   }
 
   if (typeof port === 'string') {
     port = parseInt(port)
   }
 
   if (isNaN(port)) {
-    throw errCode(new Error(`invalid port provided: ${port}`), Errors.ERR_INVALID_PORT_PARAMETER)
+    throw new CodeError(`invalid port provided: ${port}`, Errors.ERR_INVALID_PORT_PARAMETER)
   }
 
   try {
@@ -42,6 +42,6 @@ export function ipPortToMultiaddr (ip: string, port: number | string) {
   } catch (err) {
     const errMsg = `invalid ip:port for creating a multiaddr: ${ip}:${port}`
     log.error(errMsg)
-    throw errCode(new Error(errMsg), Errors.ERR_INVALID_IP)
+    throw new CodeError(errMsg, Errors.ERR_INVALID_IP)
   }
 }