ci: use older Ubuntu to retain Python 3.4

- see problematic run https://github.com/cmur2/python-bme680/actions/runs/619900122
2021-03-04 09:05:48 +01:00 · 2021-03-04 09:05:48 +01:00 · 294281658e
parent 9f3be44151
commit 294281658e
1 changed files with 1 additions and 1 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -12,7 +12,7 @@ on:

 jobs:
  build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
    strategy:
      matrix:
        python-version: