Update test matrix versions in Tests.yml (#65)

Removed 'pre' version from the test matrix.

Author: oameye

.github/workflows/Tests.yml

@@ -40,7 +40,6 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - 'pre'
           - 'lts'
           - '1'
         os:
@@ -66,4 +65,4 @@ jobs:
           file: lcov.info
           name: codecov-umbrella
           fail_ci_if_error: false
-        if: ${{ matrix.version == 'lts' }}
+        if: ${{ matrix.version == 'lts' }}