make getTrace async

apps/remix-ide/src/app/tabs/debugger-tab.js

@@ -104,9 +104,8 @@ class DebuggerTab extends ViewPlugin {
     })
   }
 
-  getTrace (hash) {
+  async getTrace (hash) {
     if (!hash) return
-    return new Promise(async (resolve, reject) => { /* eslint-disable-line */
     try {
       const web3 = await this.getDebugWeb3()
       const currentReceipt = await web3.eth.getTransactionReceipt(hash)
@@ -124,11 +123,10 @@ class DebuggerTab extends ViewPlugin {
         debugWithGeneratedSources: false
       })
     
-        resolve(await debug.debugger.traceManager.getTrace(hash))    
+      return await debug.debugger.traceManager.getTrace(hash)
     } catch (e) {
-        reject(e)
+      throw e
     }
-    })
   }
 
   fetchContractAndCompile (address, receipt) {