MINOR: Bump CI test timeouts (#128)

Looks like some of the test runs (particularly the ARM runs) are close
to the 15 minute timeout and end up occasionally being flaky and
failing. Let's bump the timeout to 20 minutes just in case so that we
aren't skating the edge anymore.

.github/workflows/test.yml

@@ -70,7 +70,7 @@ jobs:
     name: ${{ matrix.arch-label }} Debian 12 Go ${{ matrix.go }}
     needs: docker-targets
     runs-on: ${{ matrix.runs-on }}
-    timeout-minutes: 15
+    timeout-minutes: 20
     strategy:
       fail-fast: false
       matrix:
@@ -144,7 +144,7 @@ jobs:
   docker-cgo-python:
     name: AMD64 Debian 12 Go ${{ matrix.go }} - CGO Python
     runs-on: ubuntu-latest
-    timeout-minutes: 15
+    timeout-minutes: 20
     strategy:
       fail-fast: false
       matrix:
@@ -250,7 +250,7 @@ jobs:
   windows:
     name: AMD64 Windows 2019 Go ${{ matrix.go }}
     runs-on: windows-2019
-    timeout-minutes: 15
+    timeout-minutes: 20
     strategy:
       fail-fast: false
       matrix:
@@ -277,7 +277,7 @@ jobs:
   windows-mingw:
     name: AMD64 Windows MinGW ${{ matrix.mingw-n-bits }} CGO
     runs-on: windows-2019
-    timeout-minutes: 15
+    timeout-minutes: 20
     strategy:
       fail-fast: false
       matrix:
@@ -331,7 +331,7 @@ jobs:
   build-test-386:
     name: Cross-build and test for 386
     runs-on: ubuntu-latest
-    timeout-minutes: 15
+    timeout-minutes: 20
     steps:
       - name: Checkout
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
@@ -356,7 +356,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       TINYGO_VERSION: 0.33.0
-    timeout-minutes: 15
+    timeout-minutes: 20
     steps:
       - name: Checkout
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7