fix: export lifecycle stages enum (#239)

Author: jyecusch

src/index.ts

@@ -16,4 +16,4 @@ export * from './resources';
 export * from './types';
 export * from './context';
 export * from './handlers';
-export * from './lifecycle';
+export { Lifecycle } from './lifecycle';

src/lifecycle/lifecycle.ts

@@ -16,7 +16,7 @@
 const NITRIC_ENVIRONMENT = 'NITRIC_ENVIRONMENT';
 
 // Possible nitric execution environments
-enum LifecycleStage {
+export enum LifecycleStage {
   // Local development run (using nitric run/start)
   LocalRun = 'run',
   // Local development requirements building/collection (using nitric up)