use GitHub context to branch processing (#22)

src/audit.ts

@@ -1,4 +1,5 @@
 import {spawnSync, SpawnSyncReturns} from 'child_process'
+import stripAnsi from 'strip-ansi'
 
 export class Audit {
   stdout: string = ''
@@ -27,4 +28,8 @@ export class Audit {
     // `npm audit` return 1 when it found vulnerabilities
     return this.status === 1
   }
+
+  public strippedStdout(): string {
+    return `\`\`\`\n${stripAnsi(this.stdout)}\n\`\`\``
+  }
 }