Updating golang dependancies (#4075)

vendor/github.com/go-sql-driver/mysql/collations.go

@@ -8,7 +8,7 @@
 
 package mysql
 
-const defaultCollation = "utf8_general_ci"
+const defaultCollation byte = 33 // utf8_general_ci
 
 // A list of available collations mapped to the internal ID.
 // To update this map use the following MySQL query:
@@ -234,17 +234,3 @@ var collations = map[string]byte{
 	"utf8mb4_unicode_520_ci":   246,
 	"utf8mb4_vietnamese_ci":    247,
 }
-
-// A blacklist of collations which is unsafe to interpolate parameters.
-// These multibyte encodings may contains 0x5c (`\`) in their trailing bytes.
-var unsafeCollations = map[string]bool{
-	"big5_chinese_ci":   true,
-	"sjis_japanese_ci":  true,
-	"gbk_chinese_ci":    true,
-	"big5_bin":          true,
-	"gb2312_bin":        true,
-	"gbk_bin":           true,
-	"sjis_bin":          true,
-	"cp932_japanese_ci": true,
-	"cp932_bin":         true,
-}