add circle jobs to test installation with go get

.circleci/config.yml

@@ -1,5 +1,39 @@
 version: 2
 jobs:
+  test-install-golang-prev:
+    docker:
+      - image: circleci/golang:1.10
+    working_directory: /go/src/github.com/segmentio/chamber
+    steps:
+      - checkout
+      - run:
+          name: 'Test install golang (previous release)'
+          command: |
+            go get -v . && chamber version
+
+  test-install-golang-current:
+    docker:
+      - image: circleci/golang:1.11
+    working_directory: /go/src/github.com/segmentio/chamber
+    steps:
+      - checkout
+      - run:
+          name: 'Test go get install on current golang release'
+          command: |
+            go get -v . && chamber version
+
+  # only need this job until 1.13 is released
+  test-install-golang-1.11-GOMODULE-on:
+    docker:
+      - image: circleci/golang:1.11
+    working_directory: /go/src/github.com/segmentio/chamber
+    steps:
+      - checkout
+      - run:
+          name: 'Test go get install on golang 1.11 GO111MODULE=on'
+          command: |
+            GO111MODULE=on go get -v . && chamber version
+
   test:
     docker:
       - image: circleci/golang:1.10
@@ -56,6 +90,9 @@ workflows:
   test-dist-publish:
     jobs:
       - test
+      - test-install-golang-prev
+      - test-install-golang-current
+      - test-install-golang-1.11-GOMODULE-on
       - dist:
           # needed to ensure dist happens on tag events
           filters: