fix: add missing provider declaration

Author: pmb0

src/unleash-strategies/unleash-strategies.module.ts

@@ -9,6 +9,7 @@ import {
   UserWithIdStrategy,
 } from './strategy'
 import { GradualRolloutRandomStrategy } from './strategy/gradual-rollout-random'
+import { GradualRolloutUserIdStrategy } from './strategy/gradual-rollout-user-id'
 import { UnleashStrategiesService } from './unleash-strategies.service'
 import { UnleashContext } from './unleash.context'
 
@@ -29,6 +30,7 @@ export class UnleashStrategiesModule {
         UserWithIdStrategy,
         GradualRolloutRandomStrategy,
         GradualRolloutSessionIdStrategy,
+        GradualRolloutUserIdStrategy,
         ...strategies,
         { provide: 'CUSTOM_STRATEGIES', useValue: strategies },
       ],