bump copyright, added stats page and updated dependencies

vendor/github.com/urfave/cli/appveyor.yml

@@ -6,21 +6,23 @@ image: Visual Studio 2017
 
 clone_folder: c:\gopath\src\github.com\urfave\cli
 
+cache:
+  - node_modules
+
 environment:
   GOPATH: C:\gopath
-  GOVERSION: 1.8.x
-  PYTHON: C:\Python36-x64
-  PYTHON_VERSION: 3.6.x
-  PYTHON_ARCH: 64
+  GOVERSION: 1.11.x
+  GO111MODULE: on
+  GOPROXY: https://proxy.golang.org
 
 install:
-- set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
-- go version
-- go env
-- go get github.com/urfave/gfmrun/...
-- go get -v -t ./...
+  - set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
+  - go version
+  - go env
+  - go get github.com/urfave/gfmrun/cmd/gfmrun
+  - go mod vendor
 
 build_script:
-- python runtests vet
-- python runtests test
-- python runtests gfmrun
+  - go run build.go vet
+  - go run build.go test
+  - go run build.go gfmrun docs/v1/manual.md