V5 bringing RESP3, Sentinel and TypeMapping to node-redis

RESP3 Support
   - Some commands responses in RESP3 aren't stable yet and therefore return an "untyped" ReplyUnion.
 
Sentinel

TypeMapping

Correctly types Multi commands

Note: some API changes to be further documented in v4-to-v5.md

packages/client/lib/commands/ZADD_INCR.ts

@@ -0,0 +1,39 @@
+import { RedisArgument, Command } from '../RESP/types';
+import { pushMembers } from './ZADD';
+import { SortedSetMember, transformNullableDoubleReply } from './generic-transformers';
+
+export interface ZAddOptions {
+  condition?: 'NX' | 'XX';
+  comparison?: 'LT' | 'GT';
+  CH?: boolean;
+}
+
+export default {
+  FIRST_KEY_INDEX: 1,
+  transformArguments(
+    key: RedisArgument,
+    members: SortedSetMember | Array<SortedSetMember>,
+    options?: ZAddOptions
+  ) {
+    const args = ['ZADD', key];
+
+    if (options?.condition) {
+      args.push(options.condition);
+    }
+
+    if (options?.comparison) {
+      args.push(options.comparison);
+    }
+
+    if (options?.CH) {
+      args.push('CH');
+    }
+
+    args.push('INCR');
+
+    pushMembers(args, members);
+
+    return args;
+  },
+  transformReply: transformNullableDoubleReply
+} as const satisfies Command;