dockerfile: update golang 1.14 (#30)

* dockerfile, build: update golang version

.github/workflows/go.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        go: [1.13, 1.x]
+        go: [1.14, 1.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
     - name: Setup Go

.github/workflows/release.yaml

@@ -14,7 +14,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v1
         with:
-          go-version: 1.13
+          go-version: 1.14
       - name: Checkout
         uses: actions/checkout@v2
       - name: Run GoReleaser

Dockerfile

-FROM golang:1.13 AS build
+FROM golang:1.14 AS build
 
 ARG COMMIT=""
 

go.mod

 module github.com/ethersphere/bee
 
-go 1.13
+go 1.14
 
 require (
 	github.com/btcsuite/btcd v0.20.1-beta