fix: correct typescript typing

Author: RomainLanz

tests/_mocks/memory_lease_manager.ts

@@ -5,15 +5,13 @@ import { parse } from '#src/utils'
 export class MemoryLeaseManager implements LeaseManager {
   readonly #workerId: string
   readonly #leaseTimeout: number
-  readonly #renewalInterval: number
   #activeRenewals = new Map<string, NodeJS.Timeout>()
 
   static leases = new Map<string, { workerId: string; expiresAt: Date }>()
 
   constructor(config: LeaseConfig) {
     this.#workerId = config.workerId
     this.#leaseTimeout = parse(config.leaseTimeout)
-    this.#renewalInterval = parse(config.renewalInterval)
   }
 
   acquire(jobId: string): Promise<boolean> {

tests/backoff_strategy.spec.ts

@@ -87,6 +87,7 @@ test.group('BackoffStrategy', () => {
 
     assert.deepEqual(returnedConfig, config)
     assert.throws(() => {
+      // @ts-expect-error
       returnedConfig.strategy = 'linear'
     })
   })