fix: Wrap table and field names with quotes

[captchanjack]

Addresses #3

[juunini]

Thanks for your contribute.

for your contribute, I've known my code's wrong point.

CREATE TABLE TBL1 ... and SELECT ... FROM tbl1 can select table.
but, CREATE TABLE "TBL1"... and SELECT ... FROM tbl1 can't select table.
and, CREATE TABLE TBL1 ... and SELECT ... FROM "TBL1" can't select table.

I'll fix this issue will soon.
Thanks!

[juunini]

release v1.3.4

https://github.com/cloudmatelabs/gorm-gqlgen-relay/releases/tag/v1.3.4