Install types in same command as dep

[dawsbot]

When performing npx typac -s memory-cache I noticed there is first an npm install --save memory-cache then after an npm install --save @types/memory-cache.

This process can be sped up nearly 2x by performing npm install --save memory-cache @types/memory-cache.

Would you like me to implement this @ewgenius ?

[ewgenius]

Good catch! Thank you for suggestion, and feel free to do it 👍