feat: add "remove" event

Author: gajus

README.md

@@ -42,6 +42,7 @@ Supported features:
 * `pool.connect`
 * `connection.query`
 * `connect` event
+* `remove` event
 * `notice` event
 
 Known incompatibilities:

src/bridge.ts

@@ -157,6 +157,8 @@ export const createBridge = (postgres: typeof Postgres) => {
 
     public async _remove (client: {end: () => Promise<void>, }) {
       await client.end();
+
+      this.poolEvents.emit('remove', client);
     }
 
     public get _clients (): BridgetClient[] {

test/postgres-bridge/bridge.ts

@@ -42,6 +42,24 @@ for (const {
     t.is(spy.firstCall.args[0], connection);
   });
 
+  test(clientName + ': "remove" event is fired when connection is removed', async (t) => {
+    const pool = new Pool({
+      user: 'postgres',
+    });
+
+    const spy = sinon.spy();
+
+    pool.on('remove', spy);
+
+    const connection = await pool.connect();
+
+    await pool._remove(connection);
+
+    t.true(spy.called);
+
+    t.is(spy.firstCall.args[0], connection);
+  });
+
   test(clientName + ': "notice event is fired when connection produces a notice"', async (t) => {
     const pool = new Pool({
       user: 'postgres',