fix: update min Go version

Makefile

@@ -27,7 +27,6 @@ test-master:
 	@echo "everything is OK"
 
 test-release:
-	cd _test/install/binary_gopath && docker build --build-arg release=$(RELEASE) --no-cache .
 	cd _test/install/binary_nogopath && docker build --build-arg release=$(RELEASE) --no-cache .
 	@echo "everything is OK"
 

_test/install/binary_nogopath/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine AS build
+FROM golang:1.22-alpine AS build
 
 ARG release
 COPY . /root

_test/install/binary_nogopath/test.bash

@@ -27,11 +27,4 @@ diff -u actual.txt /root/expected.txt
 ./ruleguard -e 'm.Match(`$f($*_, ($x), $*_)`)' /root/target.go &> actual.txt || true
 diff -u actual.txt /root/expected2.txt
 
-export GO111MODULE=off
-cd /usr/local/go
-go get -v -u github.com/quasilyte/go-ruleguard/dsl
-go get -v -u github.com/quasilyte/ruleguard-rules-test/...
-CGO_ENABLED=0 /root/test/ruleguard -rules /root/rules.go ./src/encoding/... &> actual.txt || true
-diff -u actual.txt /root/expected3.txt
-
 echo SUCCESS

_test/install/gitclone/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine AS build
+FROM golang:1.22-alpine AS build
 
 COPY . /root
 

_test/install/gitclone/test.bash

@@ -27,11 +27,4 @@ diff -u actual.txt /root/expected4.txt
 ./go-ruleguard -e 'm.Match(`$f($*_, ($x), $*_)`)' /root/target.go &> actual.txt || true
 diff -u actual.txt /root/expected5.txt
 
-# Run inside GOROOT.
-export GO111MODULE=off
-cd /usr/local/go
-go get -v -u github.com/quasilyte/go-ruleguard/dsl
-/root/go-ruleguard/go-ruleguard -rules /root/rules.go ./src/encoding/... &> actual.txt || true
-diff -u actual.txt /root/expected6.txt
-
 echo SUCCESS

_test/install/gitclone_nobuildtag/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine AS build
+FROM golang:1.22-alpine AS build
 
 COPY . /root
 

_test/install/gitclone_toolsgo/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine AS build
+FROM golang:1.22-alpine AS build
 
 COPY . /root
 

_test/regress/issue103/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine AS build
+FROM golang:1.22-alpine AS build
 
 COPY . /root
 

_test/regress/issue193/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine AS build
+FROM golang:1.22-alpine AS build
 
 COPY . /root
 

_test/regress/issue317/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18-alpine AS build
+FROM golang:1.22-alpine AS build
 
 COPY . /root
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/quasilyte/go-ruleguard
 
-go 1.19
+go 1.22.0
 
 require (
 	github.com/go-toolsmith/astcopy v1.0.2