Update to go 1.20

Signed-off-by: Todd Short <[email protected]>

Dockerfile

@@ -6,7 +6,7 @@ WORKDIR /build
 
 # copy just enough of the git repo to parse HEAD, used to record version in OLM binaries
 RUN dnf update -y && dnf install -y bash make git mercurial jq wget && dnf upgrade -y
-RUN curl -sSL https://go.dev/dl/go1.19.linux-amd64.tar.gz | tar -xzf - -C /usr/local
+RUN curl -sSL https://go.dev/dl/go1.20.linux-amd64.tar.gz | tar -xzf - -C /usr/local
 ENV PATH=/usr/local/go/bin:$PATH
 COPY .git/HEAD .git/HEAD
 COPY .git/refs/heads/. .git/refs/heads

Makefile

@@ -11,7 +11,7 @@ endif
 SHELL := /bin/bash
 ORG := github.com/operator-framework
 PKG   := $(ORG)/operator-lifecycle-manager
-MOD_FLAGS := $(shell (go version | grep -q -E "1\.1[1-9]") && echo -mod=vendor && echo -buildvcs=false)
+MOD_FLAGS := -mod=vendor -buildvcs=false
 BUILD_TAGS := "json1"
 CMDS  := $(shell go list $(MOD_FLAGS) ./cmd/...)
 TCMDS := $(shell go list $(MOD_FLAGS) ./test/e2e/...)

go.mod

@@ -1,6 +1,6 @@
 module github.com/operator-framework/operator-lifecycle-manager
 
-go 1.19
+go 1.20
 
 require (
 	github.com/blang/semver/v4 v4.0.0