Issue type:

[x] question
[ ] bug report
[ ] feature request
[ ] documentation issue

Database system/driver:

[ ] cordova
[ ] mongodb
[ ] mssql
[ ] mysql / mariadb
[ ] oracle
[x] postgres
[ ] sqlite
[ ] sqljs
[ ] react-native
[ ] expo

TypeORM version:

[ ] latest
[x] @next
[ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem:

@ManyToOne(type => Type, { primary: true })
error: primary is not an available option anymore.

I cannot set a column primary for @manytoone columns. It worked for 0.2.9. Why this was removed?