Upgrade go compiler 1.13.4 -> 1.14.3 (hashicorp#6359)

Also simplify `make test` command.
Remove `GO111MODULE=on` and `GOFLAGS=-mod=vendor` env vars, which are no
longer necessary in Go 1.14.

.github/CONTRIBUTING.md

@@ -116,7 +116,7 @@ function tpgpatch1 {
   git checkout $pr_username/$feature_branch
   git format-patch $(git merge-base HEAD master)
 }
- 
+
 function tpgpatch2 {
   for patch in $GOPATH/src/github.com/terraform-providers/terraform-provider-google*/*.patch; do
     echo "checking ${patch}"

.go-version

@@ -1 +1 @@
-1.13.4
+1.14.3

.travis.yml

@@ -4,7 +4,7 @@ services:
 - docker
 language: go
 go:
-- "1.13.x"
+- "1.14.x"
 
 install:
 # This script is used by the Travis build to install a cookie for

GNUmakefile

@@ -2,15 +2,13 @@ TEST?=$$(go list ./...)
 WEBSITE_REPO=github.com/hashicorp/terraform-website
 PKG_NAME=google
 
-GO111MODULE=on
-
 default: build
 
 build: fmtcheck generate
 	go install
 
 test: fmtcheck generate
-	go test $(TESTARGS) -timeout=30s -parallel=4 $(TEST)
+	go test $(TESTARGS) -timeout=30s $(TEST)
 
 testacc: fmtcheck generate
 	TF_ACC=1 TF_SCHEMA_PANIC_ON_ERROR=1 go test $(TEST) -v $(TESTARGS) -timeout 240m -ldflags="-X=github.com/terraform-providers/terraform-provider-google/version.ProviderVersion=acc"
@@ -63,4 +61,3 @@ docscheck:
 	@sh -c "'$(CURDIR)/scripts/docscheck.sh'"
 
 .PHONY: build test testacc vet fmt fmtcheck lint tools errcheck test-compile website website-test docscheck generate
-

README.md

@@ -33,7 +33,7 @@ for more details on how to use `google-beta`.
 Upgrading the provider
 ----------------------
 
-The Google provider doesn't upgrade automatically once you've started using it. After a new release you can run 
+The Google provider doesn't upgrade automatically once you've started using it. After a new release you can run
 
 ```bash
 terraform init -upgrade
@@ -63,7 +63,7 @@ Developing the provider
 ---------------------------
 
 If you wish to work on the provider, you'll first need [Go](http://www.golang.org)
-installed on your machine (version 1.13.0+ is *required*). You can use [goenv](https://github.com/syndbg/goenv)
+installed on your machine (version 1.14.0+ is *required*). You can use [goenv](https://github.com/syndbg/goenv)
 to manage your Go version. You'll also need to correctly setup a [GOPATH](http://golang.org/doc/code.html#GOPATH),
 as well as adding `$GOPATH/bin` to your `$PATH`.
 

go.mod

@@ -24,4 +24,4 @@ require (
 	google.golang.org/api v0.25.0
 )
 
-go 1.13
+go 1.14