Update vendor yaegashi/msgraph.go to v0.1.2 (2)

vendor/github.com/rickb777/plural/README.md

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+# plural - Simple Go API for Pluralisation.
+
+[![GoDoc](https://img.shields.io/badge/api-Godoc-blue.svg?style=flat-square)](https://godoc.org/github.com/rickb777/plural)
+[![Build Status](https://travis-ci.org/rickb777/plural.svg?branch=master)](https://travis-ci.org/rickb777/plural)
+[![Coverage Status](https://coveralls.io/repos/github/rickb777/plural/badge.svg?branch=master&service=github)](https://coveralls.io/github/rickb777/plural?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/rickb777/plural)](https://goreportcard.com/report/github.com/rickb777/plural)
+[![Issues](https://img.shields.io/github/issues/rickb777/plural.svg)](https://github.com/rickb777/plural/issues)
+
+Package plural provides simple support for localising plurals in a flexible range of different styles.
+
+There are considerable differences around the world in the way plurals are handled. This is a simple
+but competent API for catering with these differences when presenting to people formatted text with numbers.
+
+This package is able to format **countable things** and **continuous values**. It can handle integers
+and floating point numbers equally and this allows you to decide to what extent each is appropriate.
+
+For example, `2 cars` might weigh `1.6 tonnes`; both categories are covered.
+
+This API is deliberately simple; it doesn't address the full gamut of internationalisation. If that's
+what you need, you should consider products such as https://github.com/nicksnyder/go-i18n instead.
+
+## Installation
+
+    go get -u github.com/rickb777/plural
+
+## Status
+
+This library has been in reliable production use for some time. Versioning follows the well-known semantic version pattern.