ci: update ci versions and code coverage (#59)

- update allowed Go range
- update to Ubuntu 18.04
- add codecov token

Signed-off-by: Troy Ronda <troy@troyronda.com>

ci.properties

@@ -6,4 +6,4 @@
 
 GO_VER=1.12.5
 GO_MIN_VER=1.12
-GO_MAX_VER=1.13
+GO_MAX_VER=1.14.99

ci/azure-pipelines.yml

@@ -16,7 +16,7 @@ variables:
 jobs:
 - job: UnitTest
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
   dependsOn: []
   timeoutInMinutes: 60
   steps:
@@ -26,12 +26,14 @@ jobs:
   # TODO: resolve dependencies between dependencies.sh and install_deps.yml
   - script: make unit-test
     displayName: Run checks and unit test
-  - script: bash <(curl https://codecov.io/bash)
+  - script: bash <(curl https://codecov.io/bash) -t $CODECOV_UPLOAD_TOKEN
+    env:
+      CODECOV_UPLOAD_TOKEN: $(CODECOV_UPLOAD_TOKEN)
     displayName: Upload coverage to Codecov    
 
 - job: IntegrationTest
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: ubuntu-18.04
   dependsOn: []
   timeoutInMinutes: 60
   steps: