refactor: go1.13 required now, so drop go1.9 to go1.12 support

Signed-off-by: Maxime Soulé <btik-git@scoubidou.com>

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.9.x, 1.10.x, 1.11.x, 1.12.x, 1.13.x, 1.14.x, 1.15.x, 1.16.x, 1.17.x, 1.18.x, tip]
+        go-version: [1.13.x, 1.14.x, 1.15.x, 1.16.x, 1.17.x, 1.18.x, tip]
         full-tests: [false]
         include:
           - go-version: 1.19.x
@@ -31,7 +31,7 @@ jobs:
         if: matrix.full-tests
         run: |
           curl -sL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh |
-              sh -s -- -b $HOME/go/bin v1.49.0
+              sh -s -- -b $HOME/go/bin v1.50.1
           $HOME/go/bin/golangci-lint run --max-issues-per-linter 0 \
                                          --max-same-issues 0 \
                                          -E bidichk \
@@ -54,15 +54,6 @@ jobs:
           if [ ${{ matrix.full-tests }} = true ]; then
               GO_TEST_OPTS="-covermode=atomic -coverprofile=coverage.out"
           fi
-          case ${{ matrix.go-version }} in
-              1.9.x | 1.10.x) # Before go 1.11, go modules are not available
-                  mkdir -p ../src/github.com/$GITHUB_REPOSITORY_OWNER
-                  ln -s $(pwd) ../src/github.com/$GITHUB_REPOSITORY
-                  export GOPATH=$(dirname $(pwd))
-                  cd $GOPATH/src/github.com/$GITHUB_REPOSITORY
-                  go get -t ./...
-                  ;;
-          esac
           export GORACE="halt_on_error=1"
           go test -race $GO_TEST_OPTS ./...
 
@@ -71,5 +62,5 @@ jobs:
         env:
           COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          go install github.com/mattn/goveralls@v0.0.9
+          go install github.com/mattn/goveralls@v0.0.11
           goveralls -coverprofile=coverage.out -service=github

README.md

@@ -4,61 +4,19 @@ Easy mocking of http responses from external resources.
 
 ## Install
 
-Currently supports Go 1.9 - 1.19.
+Currently supports Go 1.13 to 1.19 and is regularly tested against tip.
 
 `v1` branch has to be used instead of `master`.
 
-
-### Using go modules (aka. `go mod`)
-
 In your go files, simply use:
 ```go
 import "github.com/jarcoal/httpmock"
 ```
 
 Then next `go mod tidy` or `go test` invocation will automatically
-populate your `go.mod` with the last httpmock release, now
+populate your `go.mod` with the latest httpmock release, now
 [![Version](https://img.shields.io/github/tag/jarcoal/httpmock.svg)](https://github.com/jarcoal/httpmock/releases).
 
-Note you can use `go mod vendor` to vendor your dependencies.
-
-
-### Using `$GOPATH`
-
-`v1` branch is configured as the default branch in github, so:
-```
-go get github.com/jarcoal/httpmock
-```
-
-automatically downloads the `v1` branch in `$GOPATH/src`. Then in your
-go files use:
-```go
-import "github.com/jarcoal/httpmock"
-```
-
-
-### Vendoring, using [`govendor`](https://github.com/kardianos/govendor) for example
-
-When vendoring is used, `v1` branch has to be specified. Two choices here:
-
-- preferred way:
-  ```
-  govendor fetch github.com/jarcoal/httpmock@v1
-  ```
-  then in go files:
-  ```go
-  import "github.com/jarcoal/httpmock"
-  ```
-- old way (before `v1` was set as default branch), use gopkg to read from
-  `v1` branch:
-  ```
-  govendor fetch gopkg.in/jarcoal/httpmock.v1
-  ```
-  then in go files:
-  ```go
-  import "gopkg.in/jarcoal/httpmock.v1"
-  ```
-
 
 ## Usage