updated run_test to work with torch 1.2 which is first version where torch.jit.export is introduced

Author: aravindMahadevan

.github/workflows/run_tests.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.6", "3.7"]
-        pytorch-version: ["1.0", "1.1"]
+        pytorch-version: ["1.2"]
 
     steps:
     - uses: actions/checkout@v2