Fix the value of ginSupportMinGoVer constant by semantic (gin-gonic#3221)

Author: mstmdev

debug.go

@@ -12,7 +12,7 @@ import (
 	"strings"
 )
 
-const ginSupportMinGoVer = 14
+const ginSupportMinGoVer = 15
 
 // IsDebugging returns true if the framework is running in debug mode.
 // Use SetMode(gin.ReleaseMode) to disable debug mode.
@@ -66,7 +66,7 @@ func getMinVer(v string) (uint64, error) {
 }
 
 func debugPrintWARNINGDefault() {
-	if v, e := getMinVer(runtime.Version()); e == nil && v <= ginSupportMinGoVer {
+	if v, e := getMinVer(runtime.Version()); e == nil && v < ginSupportMinGoVer {
 		debugPrint(`[WARNING] Now Gin requires Go 1.15+.
 
 `)

debug_test.go

@@ -103,7 +103,7 @@ func TestDebugPrintWARNINGDefault(t *testing.T) {
 		SetMode(TestMode)
 	})
 	m, e := getMinVer(runtime.Version())
-	if e == nil && m <= ginSupportMinGoVer {
+	if e == nil && m < ginSupportMinGoVer {
 		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.15+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	} else {
 		assert.Equal(t, "[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)