Merge pull request #360 from bcgsc/bugfix/DEVSU-2070-export-mut-sig-tsv #1627

All 145 tests pass in 3m 5s

    1 files ±0   28 suites ±0 3m 5s ⏱️ +32s
145 tests ±0 145 ✔️ ±0 0 💤 ±0 0 ❌ ±0
142 runs ±0 142 ✔️ ±0 0 💤 ±0 0 ❌ ±0

Results for commit f33912f. ± Comparison against ancestor commit 5410b80.