Change the minor version of go to 1.13 (#13015)

* Changed go minor version 12 -> 13

* REQUIREDGOVERSION set to 1.13.0

Makefile

@@ -59,7 +59,7 @@ LDFLAGS += -X "github.com/mattermost/mattermost-server/model.BuildEnterpriseRead
 GO_MAJOR_VERSION = $(shell $(GO) version | cut -c 14- | cut -d' ' -f1 | cut -d'.' -f1)
 GO_MINOR_VERSION = $(shell $(GO) version | cut -c 14- | cut -d' ' -f1 | cut -d'.' -f2)
 MINIMUM_SUPPORTED_GO_MAJOR_VERSION = 1
-MINIMUM_SUPPORTED_GO_MINOR_VERSION = 12
+MINIMUM_SUPPORTED_GO_MINOR_VERSION = 13
 GO_VERSION_VALIDATION_ERR_MSG = Golang version is not supported, please update to at least $(MINIMUM_SUPPORTED_GO_MAJOR_VERSION).$(MINIMUM_SUPPORTED_GO_MINOR_VERSION)
 
 # GOOS/GOARCH of the build host, used to determine whether we're cross-compiling or not

scripts/prereq-check.sh

@@ -19,7 +19,7 @@ check_prereq()
 
     if check_version $installed_version $required_version; then
         echo "$dependency minimum requirement met. Required: $required_version, Found: $installed_version"
-    else 
+    else
         echo "WARNING! Mattermost did not find the minimum supported version of '$dependency' installed. Required: $required_version, Found: $installed_version"
         echo "We highly recommend stopping installation and updating dependencies before continuing"
         read -p "Enter Y to continue anyway (not recommended)." -n 1 -r
@@ -35,7 +35,7 @@ echo "Checking prerequisites"
 
 REQUIREDNODEVERSION=8.9.0
 REQUIREDNPMVERSION=5.6.0
-REQUIREDGOVERSION=1.12.0
+REQUIREDGOVERSION=1.13.0
 REQUIREDDOCKERVERSION=17.0
 
 NODEVERSION=$(sed 's/v//' <<< $(node -v))