fix: build types before running type check

Author: Gozala

.travis.yml

@@ -65,7 +65,10 @@ jobs:
       name: lint
       script:
         - npm run lint -- $RUN_SINCE --concurrency 1
-        - npm run check -- $RUN_SINCE --concurrency 1
+
+    - stage: type check
+        - npm run build:types -- $RUN_SINCE
+        - npm run check -- $RUN_SINCE
 
     - stage: test
       name: dep-check