Add ESLint (#941)

* Add eslint, switch to lint-staged for precommit

* Fix all ESLint errors

* Update GH workflow to check prettier and eslint

1 files changed, 2 insertions, 2 deletions

diff --git a/src/gateway/util/Send.ts b/src/gateway/util/Send.ts

index 1ca143b6..a89d92d7 100644
--- a/src/gateway/util/Send.ts
+++ b/src/gateway/util/Send.ts
@@ -16,7 +16,7 @@
 	along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-var erlpack: any;
+let erlpack: { pack: (data: Payload) => Buffer };
 try {
 	erlpack = require("@yukikaze-bot/erlpack");
 } catch (error) {
@@ -63,7 +63,7 @@ export function Send(socket: WebSocket, data: Payload) {
 			return;
 		}
 
-		socket.send(buffer, (err: any) => {
+		socket.send(buffer, (err) => {
 			if (err) return rej(err);
 			return res(null);
 		});