introduce v4.0.0

Author: flosch

README.md

@@ -8,7 +8,7 @@ pongo2 is a Django-syntax like templating-language.
 Install/update using `go get` (no dependencies required by pongo2):
 
 ```sh
-go get -u github.com/flosch/pongo2
+go get -u github.com/flosch/pongo2/v4
 ```
 
 Please use the [issue tracker](https://github.com/flosch/pongo2/issues) if you're encountering any problems with pongo2 or if you need help with implementing tags or filters ([create a ticket!](https://github.com/flosch/pongo2/issues/new)).
@@ -141,7 +141,7 @@ fmt.Println(out) // Output: Hello Florian!
 package main
 
 import (
-    "github.com/flosch/pongo2"
+    "github.com/flosch/pongo2/v4"
     "net/http"
 )
 

go.mod

@@ -1,4 +1,4 @@
-module github.com/flosch/pongo2
+module github.com/flosch/pongo2/v4
 
 go 1.14
 

pongo2_issues_test.go

@@ -3,7 +3,7 @@ package pongo2_test
 import (
 	"testing"
 
-	"github.com/flosch/pongo2"
+	"github.com/flosch/pongo2/v4"
 )
 
 func TestIssue151(t *testing.T) {

pongo2_template_test.go

@@ -13,7 +13,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/flosch/pongo2"
+	"github.com/flosch/pongo2/v4"
 )
 
 var adminList = []string{"user2"}

pongo2_test.go

@@ -3,7 +3,7 @@ package pongo2_test
 import (
 	"testing"
 
-	"github.com/flosch/pongo2"
+	"github.com/flosch/pongo2/v4"
 	. "gopkg.in/check.v1"
 )