chore: remove canvas devDependency (#952)

Author: christopherthielen

package.json

@@ -63,7 +63,6 @@
     "@uirouter/publish-scripts": "2.5.5",
     "@uirouter/rx": "^0.6.0",
     "bufferutil": "4.0.3",
-    "canvas": "2.7.0",
     "husky": "^5.1.2",
     "jest": "26.6.3",
     "jest-preset-angular": "8.4.0",