style(uni.scss): 添加新的文字大小变量并注释旧变量

添加从 $text-xs 到 $text-9xl 的文字大小变量，同时注释掉旧的 $text-2xl 到 $text-5xl 变量

uni.scss

@@ -43,6 +43,23 @@ $uni-border-color:#c8c7cc;
 $uni-font-size-sm:12px;
 $uni-font-size-base:14px;
 $uni-font-size-lg:16px;
+$text-xs: 20rpx;
+$text-sm: 22rpx;
+$text-base: 24rpx;
+$text-lg: 26rpx;
+$text-xl: 28rpx;
+$text-2xl: 30rpx;
+$text-3xl: 32rpx;
+$text-4xl: 34rpx;
+$text-5xl: 36rpx;
+$text-6xl: 38rpx;
+$text-7xl: 40rpx;
+$text-8xl: 42rpx;
+$text-9xl: 44rpx;
+// $text-2xl: 40rpx;
+// $text-3xl: 44rpx;
+// $text-4xl: 48rpx;
+// $text-5xl: 52rpx;
 
 /* 图片尺寸 */
 $uni-img-size-sm:20px;