## Description
Hi 👋 I ran the [DeepSource](https://deepsource.io/) static analyzer on the forked copy of this repo and found some [interesting code quality issues](https://deepsource.io/gh/ankitdobhal/goreplay/issues/). This PR fixes a few of them.
## Summary of Fixes
- Added .deepsource.toml to fix bug risks
- Empty string test can be improved
- Nested if can be replaced with else-if
## Type of change
- [✔] Antipattern
- [ ] New feature (non-breaking change which adds functionality)
## Checklist:
- [✔] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
