ci(tests): only run tests on ubuntu-latest

It works for neverwinter.nim. *shrug*

.github/workflows/test.yml

@@ -1,25 +1,17 @@
-name: test
+name: Tests
 
 on:
   # Allow running manually
   workflow_dispatch:
 
   # Run automatically
   push:
-    branches:
-      - master
     paths-ignore:
+      - '.github/**'
       - 'LICENSE'
       - '*.md'
-      - '.github/**'
       - '*.yml'
   pull_request:
-    branches:
-      - master
-    types:
-      - opened
-      - reopened
-      - synchronize
     paths-ignore:
       - '.github/**'
       - 'LICENSE'
@@ -33,35 +25,36 @@ jobs:
       matrix:
         os:
           - ubuntu-latest
-          - windows-latest
-          - macOS-latest
-        nim:
-          - 1.6.14
+          # - windows-latest
+          # - macOS-latest
+        nim-version:
           - stable
-    name: Nim ${{ matrix.nim }} (${{ matrix.os }})
+          - 1.6.14
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout
+        uses: actions/checkout@v3
+
       - name: Cache choosenim
         id: cache-choosenim
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/.choosenim
-          key: ${{ runner.os }}-choosenim-${{ matrix.nim }}
+          key: ${{ runner.os }}-choosenim-${{ matrix.nim-version }}
+
       - name: Cache nimble
         id: cache-nimble
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/.nimble
-          key: ${{ runner.os }}-nimble-${{ hashFiles('*.nimble') }}
+          key: ${{ runner.os }}-nimble-${{ matrix.nim-version }}-${{ hashFiles('nasher.nimble') }}
+
       - name: Set up Nim
         uses: jiro4989/setup-nim-action@v1
         with:
-          nim-version: ${{ matrix.nim }}
-      - name: Print Nim version
-        run: nim -v
-      - name: Print Nimble version
-        run: nimble -v
+          nim-version: ${{ matrix.nim-version }}
+
+      - name: Install dependencies
+        run: nimble install -y --depsOnly
+
       - name: Run Nimble tests
         run: nimble test -y
-      - name: Build with Nimble
-        run: nimble build -y