ga: limiting testing on push

Author: djarecka

.github/workflows/testpydra.yml

@@ -1,6 +1,11 @@
 name: Pydra
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
 
 defaults:
   run:

.github/workflows/testsingularity.yml

@@ -1,14 +1,18 @@
 name: Singularity
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
 
 jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
       fail-fast: False
 
     steps:

.github/workflows/testslurm.yml

@@ -1,6 +1,10 @@
 name: SLURM
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
 
 jobs:
   build: