Merge pull request #169 from dnephin/ci-go-1.16

ci: Add go 1.16

.circleci/config.yml

@@ -6,13 +6,6 @@ orbs:
 workflows:
   ci:
     jobs:
-      - go/test:
-          name: test-go-1.12
-          gotestsum-format: short-verbose
-          executor:
-            name: go/golang
-            tag: 1.12-alpine
-
       - go/test:
           name: test-go-1.13
           gotestsum-format: short-verbose
@@ -34,6 +27,13 @@ workflows:
             name: go/golang
             tag: 1.15-alpine
 
+      - go/test:
+          name: test-go-1.16
+          gotestsum-format: short-verbose
+          executor:
+            name: go/golang
+            tag: 1.16-rc-alpine
+
       - go/test:
           name: test-windows
           executor: windows

README.md

@@ -306,7 +306,18 @@ tests for the package which contains the changed file. By default all
 directories under the current directory will be watched. Use the `--packages` flag
 to specify a different list.
 
-While in watch mode, pressing `r` will re-run the tests for the previous event.
+While in watch mode, pressing some keys will perform an action:
+
+* `r` will run tests for the previous event.
+* `d` will run tests for the previous event using `dlv test`, allowing you to 
+  debug a test failure using [delve] A breakpoint will automatically be added at
+  the first line of any tests which failed in the previous run. Additional
+  breakpoints can be added with [`runtime.Breakpoint`](https://golang.org/pkg/runtime/#Breakpoint)
+  or by using the delve command prompt.
+
+Note that [delve] must be installed in order to use debug (`d`).
+
+[delve]: https://github.com/go-delve/delve
 
 **Example: run tests for a package when any file in that package is saved**
 ```