Downgrade canvas to version 1.6.9

package-lock.json

@@ -565,13 +565,12 @@
       "dev": true
     },
     "canvas": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/canvas/-/canvas-2.0.1.tgz",
-      "integrity": "sha512-aVESjDBMXGRL+aZqjFtxMVOg8KzHhNcKIscoeC8OROccmApKOriHsnySxq228Kc+3tzB9Qc6tzD4ukp9Zjwz1Q==",
+      "version": "1.6.9",
+      "resolved": "https://registry.npmjs.org/canvas/-/canvas-1.6.9.tgz",
+      "integrity": "sha1-4/lc7HsWvy1vP8clwC2UDTJY9ps=",
       "dev": true,
       "requires": {
-        "nan": "^2.11.1",
-        "node-pre-gyp": "^0.11.0"
+        "nan": "^2.4.0"
       }
     },
     "carto": {
@@ -2114,24 +2113,6 @@
         "sax": "^1.2.4"
       }
     },
-    "node-pre-gyp": {
-      "version": "0.11.0",
-      "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.11.0.tgz",
-      "integrity": "sha512-TwWAOZb0j7e9eGaf9esRx3ZcLaE5tQ2lvYy1pb5IAaG1a2e2Kv5Lms1Y4hpj+ciXJRofIxxlt5haeQ/2ANeE0Q==",
-      "dev": true,
-      "requires": {
-        "detect-libc": "^1.0.2",
-        "mkdirp": "^0.5.1",
-        "needle": "^2.2.1",
-        "nopt": "^4.0.1",
-        "npm-packlist": "^1.1.6",
-        "npmlog": "^4.0.2",
-        "rc": "^1.2.7",
-        "rimraf": "^2.6.1",
-        "semver": "^5.3.0",
-        "tar": "^4"
-      }
-    },
     "node-qunit-phantomjs": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/node-qunit-phantomjs/-/node-qunit-phantomjs-1.6.0.tgz",

package.json

@@ -33,7 +33,7 @@
   "devDependencies": {
     "@carto/mapnik": "^3.6.2-carto.11",
     "browserify": "~7.0.0",
-    "canvas": "^2.0.1",
+    "canvas": "^1.6.9",
     "leaflet": "1.0.3",
     "node-qunit-phantomjs": "1.6.0",
     "phantomjs-polyfill": "0.0.2",