How to upgrade Typescript to the latest version?
I had the same problem below procedure worked for me
Update NPM
npm install npm@latest -g
Update typescript
npm -g upgrade typescript
or
npm install typescript@latest -g
now you should see
tsc --version
Version 2.1.5
Since selected correct answer didn't help me I figured I'd share how I resolved the issue.
I had to remove C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.0\
from my PATH.
After that I could run this command and see the version I was expecting:
C:\>tsc --version
message TS6029: Version 1.5.3