Catch errors thrown by Audit.run and increase child process buffer size (#67)

* Audit.run does not need to be async

* Set max buffer size for npm audit subprocess to 10MiB

src/audit.ts

@@ -1,17 +1,20 @@
 import {spawnSync, SpawnSyncReturns} from 'child_process'
 import stripAnsi from 'strip-ansi'
 
+const SPAWN_PROCESS_BUFFER_SIZE = 10485760 // 10MiB
+
 export class Audit {
   stdout = ''
   private status: number | null = null
 
-  public async run(auditLevel: string): Promise<void> {
+  public run(auditLevel: string): void {
     try {
       const result: SpawnSyncReturns<string> = spawnSync(
         'npm',
         ['audit', '--audit-level', auditLevel],
         {
-          encoding: 'utf-8'
+          encoding: 'utf-8',
+          maxBuffer: SPAWN_PROCESS_BUFFER_SIZE
         }
       )