add gl-heatmap2d@1.0.2

Author: etpinard

package.json

@@ -55,6 +55,7 @@
     "fs-extra": "^0.26.2",
     "gl-error2d": "^1.0.0",
     "gl-error3d": "^1.0.0",
+    "gl-heatmap2d": "^1.0.2",
     "gl-line2d": "^1.2.1",
     "gl-line3d": "^1.1.0",
     "gl-mat4": "^1.1.2",