Making `ard_survey_svycontinuous()` a S3 method #45

All 44 tests pass, 21 skipped in 9s

1 files ±0 65 suites ±0 9s ⏱️ ±0s
65 tests ±0 44 ✅ ±0 21 💤 ±0 0 ❌ ±0
182 runs ±0 149 ✅ ±0 33 💤 ±0 0 ❌ ±0

Results for commit 0beacc7. ± Comparison against earlier commit 1cb80e8.