Prepare for 1.3.0 release 

* Fixed an issue where secret provider commands were causing "command… … not found" errors due to a previously set IFS variable. awslabs#30

* Fixed an issue where spaces files with spaces in their names were n… …ot being properly scanned in the pre-commit hook. * Now ignoring empty lines and comments (e.g., `#`) in the .gitallowed file. * Fixed an issue where numbers were being compared to strings causing failures on some platforms.

* Bug fix: the pre-commit hook previously only scanned the working di… …rectory rather than staged files. This release updates the pre-commit hook to instead scan staged files so that git-secrets will detect violations if the working directory drifts from the staging directory. * Added the `--scan-history` subcommand so that you can scan your entire git history for violations. * Added the ability to filter false positives by using a .gitallowed file. * Added support for `--cached`, `--no-index`, and `--untracked` to the `--scan` subcommand.

* Now works correctly with filenames in a repository that contain spa… …ces when executing `git secrets --scan` with no provided filename (via `git grep`). * Now works with git repositories with hundreds of thousands of files when using `git secrets --scan` with no provided filename (via `git grep`).

* Initial release of ``git-secrets``.