chore(deps): bump alpine from 3.13.3 to 3.13.4 (#74)

Bumps alpine from 3.13.3 to 3.13.4.

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Dockerfile

@@ -14,7 +14,7 @@ COPY main.go main.go
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
     go build -ldflags="-s -w"
 
-FROM alpine:3.13.3
+FROM alpine:3.13.4
 
 ENV GITHUB_ORGANIZATION=""
 ENV GITHUB_PAT=""