Update dependencies and refactoring

- update to go-pg/v9
- cleanup dependencies
- update Hook's
- extend Readme for environment configuration

Author: im-kulikov

.travis.yml

@@ -2,6 +2,9 @@ language: go
 go:
   - 1.11.x
   - 1.12.x
+  - 1.13.x
+services:
+  - postgresql
 env:
   - GO111MODULE=on
 install:
@@ -14,4 +17,4 @@ after_success:
   - bash <(curl -s https://codecov.io/bash)
 matrix:
   allow_failures:
-    - go: tip
+    - go: tip

README.md

@@ -4,6 +4,7 @@
 [![Build Status](https://travis-ci.com/go-helium/redis.svg?branch=master)](https://travis-ci.com/go-helium/redis)
 [![Report](https://goreportcard.com/badge/github.com/go-helium/postgres)](https://goreportcard.com/report/github.com/go-helium/postgres)
 [![GitHub release](https://img.shields.io/github/release/go-helium/postgres.svg)](https://github.com/go-helium/postgres)
+[![Sourcegraph](https://sourcegraph.com/github.com/go-helium/postgres/-/badge.svg)](https://sourcegraph.com/github.com/go-helium/postgres?badge)
 ![GitHub](https://img.shields.io/github/license/go-helium/postgres.svg?style=popout)
 
 Module provides you connection to PostgreSQL server
@@ -34,4 +35,9 @@ POSTGRES_PASSWORD=string
 POSTGRES_DATABASE=string
 POSTGRES_DEBUG=bool
 POSTGRES_POOL_SIZE=int
+POSTGRES_OPTIONS_HOST=string
+POSTGRES_OPTIONS_SSLKEY=string
+POSTGRES_OPTIONS_SSLMODE=string
+POSTGRES_OPTIONS_SSLCERT=string
+POSTGRES_OPTIONS_SSLROOTCERT=string
 ```

go.mod

@@ -1,14 +1,14 @@
 module github.com/go-helium/postgres
 
+go 1.13
+
+replace mellium.im/sasl v0.2.1 => github.com/mellium/sasl v0.2.1
+
 require (
-	github.com/go-pg/pg v8.0.4+incompatible
-	github.com/im-kulikov/helium v0.11.11
-	github.com/jinzhu/inflection v0.0.0-20180308033659-04140366298a // indirect
+	github.com/go-pg/pg/v9 v9.0.1
+	github.com/im-kulikov/helium v0.12.2
 	github.com/pkg/errors v0.8.1
-	github.com/spf13/viper v1.3.2
-	github.com/stretchr/testify v1.3.0
-	go.uber.org/zap v1.10.0
-	mellium.im/sasl v0.2.1 // indirect
+	github.com/spf13/viper v1.4.0
+	github.com/stretchr/testify v1.4.0
+	go.uber.org/zap v1.12.0
 )
-
-replace mellium.im/sasl v0.2.1 => github.com/mellium/sasl v0.2.1