Updated exercise

.gitignore

@@ -3,3 +3,4 @@ node_modules
 **/.DS_Store
 todo/**
 _*.js
+solution-*.js

w2_1_types/main.js

@@ -1,10 +1,10 @@
 // Types and conversions
+// !@ts-check
 
 // Ex 1 (implicit convertion)
 // Compute the time in seconds
 function timeInSeconds(hours, mins, secs) {
   // placeholder
-  // return (hours * 60 + mins) * 60 + secs;
 }
 
 console.log('Ex 1');