Update to crystal-db ~> 0.13 (#112)

* Update to crystal-db ~> 0.13
* Update to crystal-db ~> 0.13.1

shard.yml

@@ -4,7 +4,7 @@ version: 0.15.0
 dependencies:
   db:
     github: crystal-lang/crystal-db
-    version: ~> 0.12.0
+    version: ~> 0.13.1
 
 authors:
   - Juan Wajnerman <[email protected]>

src/mysql/read_packet.cr

@@ -12,8 +12,8 @@ class MySql::ReadPacket < IO
       io.read_fully(header.to_slice)
       @length = @remaining = header[0].to_i + (header[1].to_i << 8) + (header[2].to_i << 16)
       @seq = header[3]
-    rescue IO::EOFError
-      raise DB::ConnectionLost.new(@connection)
+    rescue e : IO::EOFError
+      raise DB::ConnectionLost.new(@connection, cause: e)
     end
   end
 
@@ -26,8 +26,8 @@ class MySql::ReadPacket < IO
     read_bytes = @io.read_fully(slice)
     @remaining -= read_bytes
     read_bytes
-  rescue IO::EOFError
-    raise DB::ConnectionLost.new(@connection)
+  rescue e : IO::EOFError
+    raise DB::ConnectionLost.new(@connection, cause: e)
   end
 
   {% if compare_versions(Crystal::VERSION, "0.35.0") == 0 %}

src/mysql/write_packet.cr

@@ -6,19 +6,11 @@ class MySql::WritePacket < IO
     raise "not implemented"
   end
 
-  {% if compare_versions(Crystal::VERSION, "0.35.0") == 0 %}
-    def write(slice) : Int64
-      @io.write(slice)
-    rescue IO::EOFError
-      raise DB::ConnectionLost.new(@connection)
-    end
-  {% else %}
-    def write(slice) : Nil
-      @io.write(slice)
-    rescue IO::EOFError
-      raise DB::ConnectionLost.new(@connection)
-    end
-  {% end %}
+  def write(slice) : Nil
+    @io.write(slice)
+  rescue e : IO::EOFError
+    raise DB::ConnectionLost.new(@connection, cause: e)
+  end
 
   def write_lenenc_string(s : String)
     write_lenenc_int(s.bytesize)
@@ -44,8 +36,8 @@ class MySql::WritePacket < IO
 
   def write_string(s : String)
     @io << s
-  rescue IO::EOFError
-    raise DB::ConnectionLost.new(@connection)
+  rescue e : IO::EOFError
+    raise DB::ConnectionLost.new(@connection, cause: e)
   end
 
   def write_blob(v : Bytes)