fix: moved packr2 installation to CircleCI steps

Author: prskr

.circleci/config.yml

@@ -11,6 +11,7 @@ jobs:
       - image: circleci/golang:1.12
     steps:
       - checkout
+      - run: GO111MODULE=off go get -u github.com/gobuffalo/packr/v2/packr2
       - run: curl -sL https://git.io/goreleaser | bash
 workflows:
   version: 2

.goreleaser.yml

@@ -5,7 +5,6 @@ before:
     - ./download_revealjs.sh
     - go mod download
     - go build -v ./...
-    - GO111MODULE=off go get -u github.com/gobuffalo/packr/v2/packr2
     - packr2
 builds:
   - main: ./cmd/goveal/main.go