update packages to latest version

node_modules/npm/man/man1/npm-prefix.1

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+.TH "NPM\-PREFIX" "1" "March 2017" "" ""
+.SH "NAME"
+\fBnpm-prefix\fR \- Display prefix
+.SH SYNOPSIS
+.P
+.RS 2
+.nf
+npm prefix [\-g]
+.fi
+.RE
+.SH DESCRIPTION
+.P
+Print the local prefix to standard out\. This is the closest parent directory
+to contain a package\.json file unless \fB\-g\fP is also specified\.
+.P
+If \fB\-g\fP is specified, this will be the value of the global prefix\. See
+npm help 7 \fBnpm\-config\fP for more detail\.
+.SH SEE ALSO
+.RS 0
+.IP \(bu 2
+npm help root
+.IP \(bu 2
+npm help bin
+.IP \(bu 2
+npm help 5 folders
+.IP \(bu 2
+npm help config
+.IP \(bu 2
+npm help 7 config
+.IP \(bu 2
+npm help 5 npmrc
+
+.RE
+