Expected [\n\r] but end of input found

[GioLogist]

Quite an odd issue, but it seems that this package gives an error for any project.pbxproj which doesn't have a new line at the end of the file.

Steps to reproduce the behavior

• Remove the new line from the end of any related project.pbxproj file
• Run react-native-schemes-manager

Expected behavior

Runs ok

Actual behavior

Receives error:
Expected [\n\r] but end of input found

Current fix

--- submitting PR as we speak