Upgraded SIL.BuildTasks used in .proj file. Removed dependency on it from SIL.Windows.Forms #212

All 4 593 tests pass, 231 skipped in 13m 30s

3 files ± 0 3 suites ±0 13m 30s ⏱️ + 2m 0s
4 824 tests ± 0 4 593 ✅ ± 0 231 💤 ± 0 0 ❌ ±0
13 240 runs - 756 12 666 ✅ - 703 574 💤 - 53 0 ❌ ±0

Results for commit a87ccb0. ± Comparison against earlier commit 24fe780.