The ornamental design for a triggersprayer, as shown and described.
FIG. 1 is a perspective view of a trigger sprayer illustrating my new design;
FIG. 2 is a bottom plan view of FIG. 1;
FIG. 3 is a top plan view of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is a right-side view of FIG. 1;
FIG. 6 is a front-end view of FIG. 1; and,
FIG. 7 is a rear-end view of FIG. 1.
The broken lines shown in the Figures, as well as their size and configuration, illustrate the environment only and form no part of the claimed design.