fix: build Launch provider (#319)

- **What kind of change does this PR introduce?**
Provider for Launch now installed with angulartics2 via npm

- **What is the current behavior? Link to open issue?**
when you npm i angulartics2, the provider for Launch is missing

- **What is the new behavior?**
npm i angulartics2 now installs provider for Launch, too

build.ts

@@ -17,6 +17,7 @@ const MODULE_NAMES = [
   'gst',
   'hubspot',
   'kissmetrics',
+  'launch',
   'mixpanel',
   'piwik',
   'segment',

src/app/providers/providers.component.ts

@@ -74,6 +74,11 @@ export class ProvidersComponent {
       display: 'Kissmetrics',
       type: 'Analytics',
     },
+    {
+      name: 'launch',
+      display: 'Launch, by Adobe',
+      type: 'Analytics'
+    }
     {
       name: 'mixpanel',
       display: 'Mixpanel',