Bump devtools from 0.6.0 to 0.6.1 (#2037)

* Bump devtools from 0.6.0 to 0.6.1

Bumps [devtools](https://github.com/samuelcolvin/python-devtools) from 0.6.0 to 0.6.1.
- [Release notes](https://github.com/samuelcolvin/python-devtools/releases)
- [Changelog](https://github.com/samuelcolvin/python-devtools/blob/master/HISTORY.md)
- [Commits](https://github.com/samuelcolvin/python-devtools/compare/v0.6...v0.6.1)

Signed-off-by: dependabot[bot] <support@github.com>

* remove unnecessary dependencies

* tweaks while testing 3.9

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Samuel Colvin <s@muelcolvin.com>

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
         run: make check-dist
 
   test-linux:
-    name: test py${{ matrix.python-version }} on ubuntu
+    name: test py${{ matrix.python-version }} on linux
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -195,15 +195,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os:
-        - ubuntu
-        - macos
-        - windows
-        python-version:
-        - '6'
-        - '7'
-        - '8'
-        - '9'
+        os: [ubuntu , macos , windows]
+        python-version: ['6', '7', '8', '9']
         include:
         - os: ubuntu
           platform: linux