Versioning and references

[phutelmyer]

Describe the change

• Modified exiftool repository reference to increase stability. exiftool was being sourced from the creators site, which has proven to be unstable. Moving this reference to Github.
• Updating backend dependencies
• Updating go dependencies

Describe testing procedures
Rebuilt Strelka and ran a local fileshot test for various filetypes.

Sample output
N/A

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of and tested my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings