ts-node expects ignore to be an array

Author: testerez

lib/compiler.js

@@ -127,6 +127,11 @@ var compiler = {
       }
     }
 
+    let ignore = options['ignore'] || process.env['TS_NODE_IGNORE'];
+    if (ignore && typeof ignore === 'string') {
+      ignore = [ignore];
+    }
+
     var tsNodeOptions = {
       fast: options['fast'],
       cache: options['cache'] || !options['no-cache'],
@@ -138,7 +143,7 @@ var compiler = {
       project: options['project'],
       skipProject: options['skip-project'],
       skipIgnore: options['skip-ignore'],
-      ignore: options['ignore'] || process.env['TS_NODE_IGNORE'],
+      ignore: ignore,
       ignoreWarnings: options['ignoreWarnings'] || options['ignoreDiagnostics'],
       ignoreDiagnostics: options['ignoreDiagnostics'],
       disableWarnings: options['disableWarnings'],