fix #1906 - implement BITFIELD_RO (#1988)

* fix #1906 - implement BITFIELD_RO

* set bitfield_ro min version to 6.2

packages/client/lib/commands/BITFIELD_RO.ts

@@ -0,0 +1,26 @@
+import { BitFieldGetOperation } from './BITFIELD';
+
+export const FIRST_KEY_INDEX = 1;
+
+export const IS_READ_ONLY = true;
+
+type BitFieldRoOperations = Array<
+    Omit<BitFieldGetOperation, 'operation'> &
+    Partial<Pick<BitFieldGetOperation, 'operation'>>
+>;
+
+export function transformArguments(key: string, operations: BitFieldRoOperations): Array<string> {
+    const args = ['BITFIELD_RO', key];
+
+    for (const operation of operations) {
+        args.push(
+            'GET',
+            operation.encoding,
+            operation.offset.toString()
+        );
+    }
+
+    return args;
+}
+
+export declare function transformReply(): Array<number | null>;