The ornamental design for lighter, as shown and described.
FIG. 1 is a perspective view of a lighter according to an embodiment of the present invention;
FIG. 2 is a rear elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The lower portion of the lighter, including the details of the bottom plan view, and the internal features of the upper portion of the lighter, as visible in the side elevation and top plan views, are shown in broken lines. The broken lines shown herein are for illustrative purposes only and form no part of the claimed design.