Delete vendored code and update CI to Go 1.13 (#158)

As the Go community transitions to using the modules ecosystem,
we want to only support one way of managing dependencies.
So this change moves to only using Go modules for dependency management.

This means that our effective minimum Go version increases to Go 1.11.
To account for this, we also update:
  - the documentation
  - Makefile
  - CI scripts

1 files changed, 0 insertions, 97 deletions

diff --git a/vendor/golang.org/x/sys/windows/exec_windows.go b/vendor/golang.org/x/sys/windows/exec_windows.go
deleted file mode 100644
index 3606c3a..0000000
--- a/vendor/golang.org/x/sys/windows/exec_windows.go
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Fork, exec, wait, etc.
-
-package windows
-
-// EscapeArg rewrites command line argument s as prescribed
-// in http://msdn.microsoft.com/en-us/library/ms880421.
-// This function returns "" (2 double quotes) if s is empty.
-// Alternatively, these transformations are done:
-// - every back slash (\) is doubled, but only if immediately
-//   followed by double quote (");
-// - every double quote (") is escaped by back slash (\);
-// - finally, s is wrapped with double quotes (arg -> "arg"),
-//   but only if there is space or tab inside s.
-func EscapeArg(s string) string {
-	if len(s) == 0 {
-		return "\"\""
-	}
-	n := len(s)
-	hasSpace := false
-	for i := 0; i < len(s); i++ {
-		switch s[i] {
-		case '"', '\\':
-			n++
-		case ' ', '\t':
-			hasSpace = true
-		}
-	}
-	if hasSpace {
-		n += 2
-	}
-	if n == len(s) {
-		return s
-	}
-
-	qs := make([]byte, n)
-	j := 0
-	if hasSpace {
-		qs[j] = '"'
-		j++
-	}
-	slashes := 0
-	for i := 0; i < len(s); i++ {
-		switch s[i] {
-		default:
-			slashes = 0
-			qs[j] = s[i]
-		case '\\':
-			slashes++
-			qs[j] = s[i]
-		case '"':
-			for ; slashes > 0; slashes-- {
-				qs[j] = '\\'
-				j++
-			}
-			qs[j] = '\\'
-			j++
-			qs[j] = s[i]
-		}
-		j++
-	}
-	if hasSpace {
-		for ; slashes > 0; slashes-- {
-			qs[j] = '\\'
-			j++
-		}
-		qs[j] = '"'
-		j++
-	}
-	return string(qs[:j])
-}
-
-func CloseOnExec(fd Handle) {
-	SetHandleInformation(Handle(fd), HANDLE_FLAG_INHERIT, 0)
-}
-
-// FullPath retrieves the full path of the specified file.
-func FullPath(name string) (path string, err error) {
-	p, err := UTF16PtrFromString(name)
-	if err != nil {
-		return "", err
-	}
-	n := uint32(100)
-	for {
-		buf := make([]uint16, n)
-		n, err = GetFullPathName(p, uint32(len(buf)), &buf[0], nil)
-		if err != nil {
-			return "", err
-		}
-		if n <= uint32(len(buf)) {
-			return UTF16ToString(buf[:n]), nil
-		}
-	}
-}