Update dev dependencies

Closes #273. We cannot upgrade Prettier because Jest is not compatible with it.

Author: domenic

.eslintignore

@@ -0,0 +1,34 @@
+import domenicConfig from "@domenic/eslint-config";
+import globals from "globals";
+
+export default [
+  {
+    ignores: [
+      "test/output/",
+      "test/__snapshots__/"
+    ]
+  },
+  {
+    files: ["**/*.js"],
+    languageOptions: {
+      sourceType: "commonjs",
+      globals: globals.node
+    }
+  },
+  {
+    files: [
+      "test/test.js",
+      "test/*.test.js"
+    ],
+    languageOptions: {
+      globals: globals.jest
+    }
+  },
+  ...domenicConfig,
+  {
+    rules: {
+      "max-len": ["error", { code: 120, ignoreTemplateLiterals: true }],
+      "require-unicode-regexp": "off"
+    }
+  }
+];

.eslintrc.json

@@ -116,7 +116,7 @@ function isArrayBuffer(value) {
   try {
     byteLengthGetter.call(value);
     return true;
-  } catch (e) {
+  } catch {
     return false;
   }
 }