remove event name constants (to be added to .d.ts)

Author: arcticnotes

lib/index.js

@@ -1 +1 @@
-export { Syncline, EVENT_STDOUT, EVENT_STDERR, EVENT_EXIT} from './syncline.js';
+export { Syncline} from './syncline.js';

lib/syncline.js

@@ -135,9 +135,9 @@ const MESSAGE_STDERR = 'stderr'; // when a line is received on the standard erro
 
 const LF = Buffer.from( [ 0x0A]);
 
-export const EVENT_STDOUT = 'stdout';
-export const EVENT_STDERR = 'stderr';
-export const EVENT_EXIT   = 'exit';
+const EVENT_STDOUT = 'stdout';
+const EVENT_STDERR = 'stderr';
+const EVENT_EXIT   = 'exit';
 
 export class Syncline extends EventEmitter {