[fix] update badges & coverage for earlier go versions

.travis.yml

@@ -10,6 +10,6 @@ before_install:
   - go get -v github.com/google/go-querystring/query
   - go get -v github.com/h2non/gock
   - cp .env.dist .env
-script: go test -race -coverprofile=coverage.txt -covermode=atomic -v ./...
+script: ./go.test.sh
 after_success:
   - bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,6 +1,6 @@
 [![Build Status](https://img.shields.io/travis/retailcrm/api-client-go/master.svg?logo=travis&style=flat-square)](https://travis-ci.org/retailcrm/api-client-go)
 [![GitHub release](https://img.shields.io/github/release/retailcrm/api-client-go.svg?style=flat-square)](https://github.com/retailcrm/api-client-go/releases)
-[![GoLang version](https://img.shields.io/badge/go-1.8%2C%201.9%2C%201.10-blue.svg?style=flat-square)](https://golang.org/dl/)
+[![GoLang version](https://img.shields.io/badge/go-1.8%20--%201.13-blue?style=flat-square)](https://golang.org/dl/)
 [![Godoc reference](https://img.shields.io/badge/godoc-reference-blue.svg?style=flat-square)](https://godoc.org/github.com/retailcrm/api-client-go)
 
 

go.test.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -e
+echo "" > coverage.txt
+
+for d in $(go list ./... | grep -v vendor); do
+    go test -race -coverprofile=profile.out -covermode=atomic "$d"
+    if [ -f profile.out ]; then
+        cat profile.out >> coverage.txt
+        rm profile.out
+    fi
+done