ci: set fail-fast false for cross-platform matrix

Windows has 15 known test failures (#39) related to path separators
and managed install paths. Use fail-fast: false so Linux and macOS
results are not cancelled by Windows failures.

Signed-off-by: Sebastien Tardif <sebtardif@ncf.ca>

Author: SebTardif

.github/workflows/ci.yml

@@ -15,6 +15,7 @@ concurrency:
 jobs:
   unit-test:
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}