ci: Run tests against python3.7 instead of python3.6

Author: pgrzesik

.github/workflows/integrate.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.6]
+        python-version: [2.7, 3.7]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.6]
+        python-version: [2.7, 3.7]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -117,7 +117,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.6]
+        python-version: [2.7, 3.7]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2

.github/workflows/validate.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.6]
+        python-version: [2.7, 3.7]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -93,7 +93,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.6]
+        python-version: [2.7, 3.7]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -146,7 +146,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.6]
+        python-version: [2.7, 3.7]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2

example/serverless.yml

@@ -2,7 +2,7 @@ service: sls-py-req-test
 
 provider:
   name: aws
-  runtime: python3.6
+  runtime: python3.7
 
 plugins:
   - serverless-python-requirements

example_native_deps/serverless.yml

@@ -2,7 +2,7 @@ service: sls-py-req-test
 
 provider:
   name: aws
-  runtime: python3.6
+  runtime: python3.7
 
 plugins:
   - serverless-python-requirements