update to latest micro

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.github/workflows/pr.yml

@@ -1,4 +1,4 @@
-name: pr test
+name: prbuild
 on:
   pull_request:
     branches:
@@ -11,7 +11,7 @@ jobs:
     - name: setup
       uses: actions/setup-go@v2
       with:
-        go-version: 1.15
+        go-version: 1.16
     - name: checkout
       uses: actions/checkout@v2
     - name: cache
@@ -24,7 +24,7 @@ jobs:
       run: go get -v -t -d ./...
     - name: test
       env:
-        IN_TRAVIS_CI: yes
+        INTEGRATION_TESTS: yes
       run: go test -mod readonly -v ./...
   lint:
     name: lint