v0.1.20

TriangularSolve v0.1.20

Diff since v0.1.19

Merged pull requests:

• enable dependabot for GitHub actions (#30) (@ranocha)
• Bump actions/checkout from 2 to 3 (#31) (@dependabot[bot])
• Bump codecov/codecov-action from 1 to 3 (#32) (@dependabot[bot])
• Bump actions/cache from 1 to 3 (#33) (@dependabot[bot])
• Migrate from SnoopPrecompile to PrecompileTools (#34) (@timholy)
• Bump actions/checkout from 3 to 4 (#35) (@dependabot[bot])