Remove explicit test on v1.8 (#137)

Author: jishnub

.github/workflows/ci.yml

@@ -1,7 +1,17 @@
 name: CI
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - 'LICENSE'
+      - 'README.md'
+      - '.github/workflows/TagBot.yml'
+  pull_request:
+    paths-ignore:
+      - 'LICENSE'
+      - 'README.md'
+      - '.github/workflows/TagBot.yml'
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -12,7 +22,6 @@ jobs:
         version:
           - '1.6'
           - '1'
-          - '^1.8.0-0'
         os:
           - ubuntu-latest
           - macOS-latest