Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,52 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+
+If possible, please provide runnable example such as:
+
+```go
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+
+	"github.com/jackc/pgx/v4"
+)
+
+func main() {
+	conn, err := pgx.Connect(context.Background(), os.Getenv("DATABASE_URL"))
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer conn.Close(context.Background())
+
+	// Your code here...
+}
+```
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Actual behavior**
+A clear and concise description of what actually happened.
+
+**Version**
+ - Go: `$ go version` -> [e.g. go version go1.18.3 darwin/amd64]
+ - PostgreSQL: `$ psql --no-psqlrc --tuples-only -c 'select version()'` -> [e.g. PostgreSQL 14.4 on x86_64-apple-darwin21.5.0, compiled by Apple clang version 13.1.6 (clang-1316.0.21.2.5), 64-bit]
+ - pgx: `$ grep 'github.com/jackc/pgx/v[0-9]' go.mod` -> [e.g. v4.16.1]
+
+**Additional context**
+Add any other context about the problem here.