chore: bump Go to 1.20 (#5067)

* update go.mod, linter, protoc dockerfile

* bump go version in .golangci.yaml

.golangci.yaml

@@ -43,7 +43,7 @@ linters:
     - misspell
 
 run:
-  go: 1.19
+  go: '1.20'
   skip-files:
     - ".*._mock.go$"
     - ".*._test.go$"

Dockerfile.protoc

@@ -1,4 +1,4 @@
-FROM --platform=linux/amd64 golang:1.19
+FROM --platform=linux/amd64 golang:1.20
 
 # Set environment variable for protoc
 ENV PROTOC_ZIP=protoc-3.19.4-linux-x86_64.zip
@@ -13,9 +13,8 @@ RUN curl --retry 5 -OL https://github.com/protocolbuffers/protobuf/releases/down
     && rm -f $PROTOC_ZIP
 
 # Install Go tools
-RUN go install \
-    github.com/twitchtv/twirp/protoc-gen-twirp@v8.1.0 \
-    google.golang.org/protobuf/cmd/protoc-gen-go@v1.27.1 \
-    github.com/magefile/mage@v1.14.0
+RUN go install github.com/twitchtv/twirp/protoc-gen-twirp@v8.1.0
+RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.27.1
+RUN go install github.com/magefile/mage@v1.14.0
 
 ENV TRIVY_PROTOC_CONTAINER=true

go.mod

@@ -1,6 +1,6 @@
 module github.com/aquasecurity/trivy
 
-go 1.19
+go 1.20
 
 require (
 	github.com/Azure/azure-sdk-for-go v68.0.0+incompatible