use Releaser v2 config, add Go 1.15 + 1.16 CI (#11)

Author: eli-darkly

.circleci/config.yml

@@ -6,12 +6,18 @@ orbs:
 workflows:
   workflow:
     jobs:
+      - go-test:
+          name: Go 1.16
+          docker-image: cimg/go:1.16
+      - go-test:
+          name: Go 1.15
+          docker-image: cimg/go:1.15
       - go-test:
           name: Go 1.14
-          docker-image: circleci/golang:1.14
+          docker-image: cimg/go:1.14
       - go-test:
           name: Go 1.13
-          docker-image: circleci/golang:1.13
+          docker-image: cimg/go:1.13
       - go-test-windows:
           name: Windows
 

.ldrelease/config.yml

@@ -1,7 +1,12 @@
-template:
-  name: go
-  env:
-    LD_RELEASE_GO_IMPORT_PATH: github.com/launchdarkly/go-test-helpers
+version: 2
+
+jobs:
+  - docker:
+      image: golang:1.13-buster
+    template:
+      name: go
+    env:
+      LD_RELEASE_GO_IMPORT_PATH: github.com/launchdarkly/go-test-helpers
 
 publications:
   - url: https://pkg.go.dev/github.com/launchdarkly/go-test-helpers