fix TS issues

packages/devtools/src/devtoolsdriver.ts

@@ -112,7 +112,7 @@ export default class DevToolsDriver {
                 if (err.message.includes('most likely because of a navigation')) {
                     log.debug('Command failed due to unfinished page transition, retrying...')
                     const page = self.getPageHandle()
-                    await new Promise((resolve, reject) => {
+                    await new Promise<void>((resolve, reject) => {
                         const pageloadTimeout = setTimeout(
                             () => reject(new Error('page load timeout')),
                             self.timeouts.get('pageLoad'))

packages/wdio-devtools-service/src/gatherer/trace.ts

@@ -354,7 +354,7 @@ export default class TraceGatherer extends EventEmitter {
         }
         const networkStatusMonitor = this._networkStatusMonitor
 
-        const promise = new Promise((resolve) => {
+        const promise = new Promise<void>((resolve) => {
             const onIdle = () => {
                 // eslint-disable-next-line no-use-before-define
                 networkStatusMonitor.once('network-2-busy', onBusy)

packages/wdio-devtools-service/src/index.ts

@@ -119,7 +119,7 @@ export default class DevToolsService implements WebdriverIO.ServiceInstance {
             })
         })
 
-        return new Promise((resolve) => {
+        return new Promise<void>((resolve) => {
             log.info(`Wait until tracing for command ${commandName} finishes`)
 
             /**

packages/wdio-local-runner/src/index.ts

@@ -82,7 +82,7 @@ export default class LocalRunner {
             worker.postMessage('endSession', payload)
         }
 
-        return new Promise((resolve) => {
+        return new Promise<void>((resolve) => {
             const timeout = setTimeout(resolve, SHUTDOWN_TIMEOUT)
             const interval = setInterval(() => {
                 const busyWorker = Object.entries(this.workerPool)

packages/wdio-logger/src/node.ts

@@ -134,15 +134,15 @@ export default function getLogger (name: string) {
  * Wait for writable stream to be flushed.
  * Calling this prevents part of the logs in the very env to be lost.
  */
-getLogger.waitForBuffer = async () => new Promise(resolve => {
+getLogger.waitForBuffer = async () => new Promise<void>(resolve => {
     // @ts-ignore
     if (logFile && Array.isArray(logFile.writableBuffer) && logFile.writableBuffer.length !== 0) {
         return setTimeout(async () => {
             await getLogger.waitForBuffer()
             resolve()
         }, 20)
     }
-    resolve(true)
+    resolve()
 })
 getLogger.setLevel = (name: string, level: log.LogLevelDesc) => loggers[name].setLevel(level)
 getLogger.clearLogger = () => {

packages/wdio-shared-store-service/src/server.ts

@@ -48,9 +48,9 @@ const startServer = () => new Promise((resolve, reject) => {
     })
 })
 
-const stopServer = () => new Promise((resolve) => {
+const stopServer = () => new Promise<void>((resolve) => {
     if (app.server.close) {
-        return app.server.close(resolve)
+        return app.server.close(() => resolve())
     }
     resolve()
 })

packages/webdriverio/src/commands/browser/debug.ts

@@ -113,5 +113,5 @@ export default function debug(
         }
     })
 
-    return new Promise((resolve) => (commandResolve = resolve))
+    return new Promise<void>((resolve) => (commandResolve = resolve))
 }