Bump github.com/spf13/cobra from 1.2.0 to 1.2.1

Bumps [github.com/spf13/cobra](https://github.com/spf13/cobra) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/spf13/cobra/releases)
- [Changelog](https://github.com/spf13/cobra/blob/master/CHANGELOG.md)
- [Commits](https://github.com/spf13/cobra/compare/v1.2.0...v1.2.1)

---
updated-dependencies:
- dependency-name: github.com/spf13/cobra
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/spf13/cobra/bash_completions.go

@@ -512,7 +512,9 @@ func writeLocalNonPersistentFlag(buf io.StringWriter, flag *pflag.Flag) {
 
 // Setup annotations for go completions for registered flags
 func prepareCustomAnnotationsForFlags(cmd *Command) {
-	for flag := range cmd.Root().flagCompletionFunctions {
+	flagCompletionMutex.RLock()
+	defer flagCompletionMutex.RUnlock()
+	for flag := range flagCompletionFunctions {
 		// Make sure the completion script calls the __*_go_custom_completion function for
 		// every registered flag.  We need to do this here (and not when the flag was registered
 		// for completion) so that we can know the root command name for the prefix

vendor/github.com/spf13/cobra/command.go

@@ -142,9 +142,6 @@ type Command struct {
 	// that we can use on every pflag set and children commands
 	globNormFunc func(f *flag.FlagSet, name string) flag.NormalizedName
 
-	//flagCompletionFunctions is map of flag completion functions.
-	flagCompletionFunctions map[*flag.Flag]func(cmd *Command, args []string, toComplete string) ([]string, ShellCompDirective)
-
 	// usageFunc is usage func defined by user.
 	usageFunc func(*Command) error
 	// usageTemplate is usage template defined by user.

vendor/github.com/spf13/cobra/completions.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"strings"
+	"sync"
 
 	"github.com/spf13/pflag"
 )
@@ -17,6 +18,12 @@ const (
 	ShellCompNoDescRequestCmd = "__completeNoDesc"
 )
 
+// Global map of flag completion functions. Make sure to use flagCompletionMutex before you try to read and write from it.
+var flagCompletionFunctions = map[*pflag.Flag]func(cmd *Command, args []string, toComplete string) ([]string, ShellCompDirective){}
+
+// lock for reading and writing from flagCompletionFunctions
+var flagCompletionMutex = &sync.RWMutex{}
+
 // ShellCompDirective is a bit map representing the different behaviors the shell
 // can be instructed to have once completions have been provided.
 type ShellCompDirective int
@@ -100,15 +107,13 @@ func (c *Command) RegisterFlagCompletionFunc(flagName string, f func(cmd *Comman
 	if flag == nil {
 		return fmt.Errorf("RegisterFlagCompletionFunc: flag '%s' does not exist", flagName)
 	}
+	flagCompletionMutex.Lock()
+	defer flagCompletionMutex.Unlock()
 
-	root := c.Root()
-	if _, exists := root.flagCompletionFunctions[flag]; exists {
+	if _, exists := flagCompletionFunctions[flag]; exists {
 		return fmt.Errorf("RegisterFlagCompletionFunc: flag '%s' already registered", flagName)
 	}
-	if root.flagCompletionFunctions == nil {
-		root.flagCompletionFunctions = map[*pflag.Flag]func(cmd *Command, args []string, toComplete string) ([]string, ShellCompDirective){}
-	}
-	root.flagCompletionFunctions[flag] = f
+	flagCompletionFunctions[flag] = f
 	return nil
 }
 
@@ -402,7 +407,9 @@ func (c *Command) getCompletions(args []string) (*Command, []string, ShellCompDi
 	// Find the completion function for the flag or command
 	var completionFn func(cmd *Command, args []string, toComplete string) ([]string, ShellCompDirective)
 	if flag != nil && flagCompletion {
-		completionFn = c.Root().flagCompletionFunctions[flag]
+		flagCompletionMutex.RLock()
+		completionFn = flagCompletionFunctions[flag]
+		flagCompletionMutex.RUnlock()
 	} else {
 		completionFn = finalCmd.ValidArgsFunction
 	}

vendor/github.com/spf13/cobra/fish_completions.go

@@ -152,11 +152,11 @@ function __%[1]s_prepare_completions
             # We don't need descriptions anyway since there is only a single
             # real completion which the shell will expand immediately.
             set -l split (string split --max 1 \t $__%[1]s_comp_results[1])
-        
+
             # Fish won't add a space if the completion ends with any
             # of the following characters: @=/:.,
             set -l lastChar (string sub -s -1 -- $split)
-            if not string match -r -q "[@=/:.,]" -- "$lastChar"                
+            if not string match -r -q "[@=/:.,]" -- "$lastChar"
                 # In other cases, to support the "nospace" directive we trick the shell
                 # by outputting an extra, longer completion.
                 __%[1]s_debug "Adding second completion to perform nospace directive"