Use go1.13; remove vendor folder; update .github action (#130)

Author: alexandear

.github/workflows/go.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.14', '1.15' ]
+        go: [ '1.18.1', '1.17.6', '1.16.5' ]
     steps:
     - uses: actions/checkout@v3
 

README.md

@@ -4,14 +4,14 @@
 [![Maintainability](https://api.codeclimate.com/v1/badges/1d64bc6c8474c2074f2b/maintainability)](https://codeclimate.com/github/stretchr/objx/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/1d64bc6c8474c2074f2b/test_coverage)](https://codeclimate.com/github/stretchr/objx/test_coverage)
 [![Sourcegraph](https://sourcegraph.com/github.com/stretchr/objx/-/badge.svg)](https://sourcegraph.com/github.com/stretchr/objx)
-[![GoDoc](https://godoc.org/github.com/stretchr/objx?status.svg)](https://godoc.org/github.com/stretchr/objx)
+[![GoDoc](https://pkg.go.dev/badge/github.com/stretchr/objx?utm_source=godoc)](https://pkg.go.dev/github.com/stretchr/objx)
 
 Objx - Go package for dealing with maps, slices, JSON and other data.
 
 Get started:
 
 - Install Objx with [one line of code](#installation), or [update it with another](#staying-up-to-date)
-- Check out the API Documentation http://godoc.org/github.com/stretchr/objx
+- Check out the API Documentation http://pkg.go.dev/github.com/stretchr/objx
 
 ## Overview
 Objx provides the `objx.Map` type, which is a `map[string]interface{}` that exposes a powerful `Get` method (among others) that allows you to easily and quickly get access to data within the map, without having to worry too much about type assertions, missing data, default values etc.
@@ -74,7 +74,7 @@ To update Objx to the latest version, run:
     go get -u github.com/stretchr/objx
 
 ### Supported go versions
-We support the latest three major Go versions, which are 1.10, 1.11 and 1.12 at the moment.
+We currently support the most recent major Go versions from 1.13 onward.
 
 ## Contributing
 Please feel free to submit issues, fork the repository and send pull requests!

Taskfile.yml

@@ -1,8 +1,5 @@
 version: '2'
 
-env:
-  GOFLAGS: -mod=vendor
-
 tasks:
   default:
     deps: [test]

go.mod

@@ -1,5 +1,5 @@
 module github.com/stretchr/objx
 
-go 1.12
+go 1.13
 
 require github.com/stretchr/testify v1.8.1