remove bmp-js dependency (#322)

This PR removes bmp-js and relies purely on node-canvas for image decoding.
As discussed in #319, bmp-js decodes images as ABGR, but we need RGBA.

Note: a small change to the CI setup was needed to get node-canvas installed/running on a (relatively) modern version of node.

.circleci/config.yml

@@ -3,7 +3,7 @@ jobs:
   build:
     working_directory: ~/repo
     docker:
-      - image: circleci/node:latest
+      - image: cimg/node:16.17.0
     steps:
       - checkout
       - run: ./scripts/ci.sh

package.json

@@ -48,7 +48,6 @@
     "@types/jest": "26.0.14",
     "@types/node": "13.11.1",
     "benchmark": "2.1.4",
-    "bmp-js": "0.1.0",
     "canvas": "2.6.1",
     "commitizen": "4.2.1",
     "core-js": "3.6.5",

scripts/ci.sh

@@ -4,6 +4,9 @@
 #
 set -euo pipefail
 
+sudo apt-get update
+sudo apt-get install -y build-essential libcairo2-dev libpango1.0-dev libjpeg-dev libgif-dev librsvg2-dev
+
 # Install dependencies
 ADBLOCK=1 yarn