build: add example usage in cmd/main.go and correct build script

.github/workflows/go.yml

@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go 1.15
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.15
       id: go
 
     - name: Check out code into the Go module directory

cmd/main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/mehanizm/airtable"
+)
+
+const (
+	airtableAPIKey    = "xxx"
+	airtableDBName    = "xxx"
+	airtableTableName = "xxx"
+)
+
+func main() {
+	airtableClient := airtable.NewClient(airtableAPIKey)
+	airtableTable := airtableClient.GetTable(airtableDBName, airtableTableName)
+
+	offset := ""
+
+	for {
+		records, err := airtableTable.GetRecords().
+			WithFilterFormula("NOT({SomeBoolColumn})").
+			ReturnFields("Column1", "Column2", "Column3", "Column4").
+			MaxRecords(100).
+			PageSize(10).
+			WithOffset(offset).
+			Do()
+		if err != nil {
+			panic(err)
+		}
+
+		for recordNum, record := range records.Records {
+			fmt.Println("====iteration====")
+			fmt.Println(recordNum, record)
+		}
+
+		offset = records.Offset
+		if offset == "" {
+			break
+		}
+	}
+
+}