bumped to gloang 1.14.0 (#594)

Signed-off-by: Daniel Sutton <daniel@ducksecops.uk>

Co-authored-by: Liz Rice <liz@lizrice.com>

Dockerfile

-FROM golang:1.13 AS build
+FROM golang:1.14.0 AS build
 WORKDIR /go/src/github.com/aquasecurity/kube-bench/
 COPY go.mod go.sum ./
 COPY main.go .