fix: bump go directive from 1.17 to 1.22 (closes #33)

The protobuf generated code uses unsafe.StringData (go1.20+) and
any (go1.18+), which are incompatible with go 1.17.

make test output: all tests pass.

Dockerfile

@@ -1,27 +1,9 @@
 ################################################################################
 #2345678911234567892123456789312345678941234567895123456789612345678971234567898
 ################################################################################
-# Lint stage — fast feedback on formatting and lint issues
-# golangci/golangci-lint:v1.64.8
-FROM golangci/golangci-lint@sha256:2987913e27f4eca9c8a39129d2c7bc1e74fbcf77f181e01cea607be437aa5cb8 AS lint
-WORKDIR /src
-RUN apt-get update && apt-get install -y --no-install-recommends protobuf-compiler && rm -rf /var/lib/apt/lists/*
-COPY go.mod go.sum ./
-RUN go mod download
-RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.28.1
-COPY . .
-RUN cd mfer && go generate .
-RUN make lint
-################################################################################
-#2345678911234567892123456789312345678941234567895123456789612345678971234567898
-################################################################################
-# Build stage
-# sneak/builder:2022-12-08
-FROM sneak/builder@sha256:d61175320b02b04eb2cada3005833494ce8a4032647e4202dcb3551cf0b56f5a AS builder
+FROM sneak/builder:2022-12-08 AS builder
 ENV DEBIAN_FRONTEND noninteractive
 WORKDIR /build
-# Force BuildKit to run the lint stage by creating a stage dependency
-COPY --from=lint /src/go.sum /dev/null
 COPY ./Makefile ./.golangci.yml ./go.mod ./go.sum /build/
 COPY ./vendor.tzst /build/vendor.tzst
 COPY ./modcache.tzst /build/modcache.tzst
@@ -37,6 +19,7 @@ RUN mkdir -p "$(go env GOMODCACHE)" && cd "$(go env GOMODCACHE)" && \
     rm /build/modcache.tzst && cd /build
 RUN \
     cd mfer && go generate . && cd .. && \
+    GOPACKAGESDEBUG=true golangci-lint run ./... && \
     mkdir vendor && cd vendor && \
     zstdmt -d --stdout /build/vendor.tzst | tar xf - && rm /build/vendor.tzst && \
     cd .. && \