Modernize tech stack and add support for node.js 18 and 20

.eslintrc.js

@@ -0,0 +1,227 @@
+/*
+👋 Hi! This file was autogenerated by tslint-to-eslint-config.
+https://github.com/typescript-eslint/tslint-to-eslint-config
+
+It represents the closest reasonable ESLint configuration to this
+project's original TSLint configuration.
+
+We recommend eventually switching this configuration to extend from
+the recommended rulesets in typescript-eslint. 
+https://github.com/typescript-eslint/tslint-to-eslint-config/blob/master/docs/FAQs.md
+
+Happy linting! 💖
+*/
+module.exports = {
+    "env": {
+        "es6": true,
+        "node": true
+    },
+    "extends": [
+        "prettier"
+    ],
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+        "project": "tsconfig.json",
+        "sourceType": "module"
+    },
+    "plugins": [
+        "eslint-plugin-jsdoc",
+        "eslint-plugin-import",
+        "@typescript-eslint",
+        "@typescript-eslint/tslint"
+    ],
+    "root": true,
+    "rules": {
+        "@typescript-eslint/array-type": [
+            "error",
+            {
+                "default": "array"
+            }
+        ],
+        "@typescript-eslint/await-thenable": "error",
+        "@typescript-eslint/consistent-type-assertions": "error",
+        "@typescript-eslint/explicit-member-accessibility": [
+            "error",
+            {
+                "accessibility": "explicit"
+            }
+        ],
+        "@typescript-eslint/indent": [
+            "error",
+            4,
+            {
+                "FunctionDeclaration": {
+                    "parameters": "first"
+                },
+                "FunctionExpression": {
+                    "parameters": "first"
+                }
+            }
+        ],
+        "@typescript-eslint/member-delimiter-style": [
+            "error",
+            {
+                "multiline": {
+                    "delimiter": "semi",
+                    "requireLast": true
+                },
+                "singleline": {
+                    "delimiter": "semi",
+                    "requireLast": false
+                }
+            }
+        ],
+        "@typescript-eslint/naming-convention": [
+            "error",
+            {
+                "selector": "variable",
+                "format": [
+                    "camelCase",
+                    "UPPER_CASE"
+                ],
+                "leadingUnderscore": "forbid",
+                "trailingUnderscore": "forbid"
+            }
+        ],
+        "@typescript-eslint/no-empty-function": "error",
+        "@typescript-eslint/no-for-in-array": "error",
+        "@typescript-eslint/no-inferrable-types": "error",
+        "@typescript-eslint/no-misused-new": "error",
+        "@typescript-eslint/no-require-imports": "error",
+        "@typescript-eslint/no-shadow": [
+            "error",
+            {
+                "hoist": "all"
+            }
+        ],
+        "@typescript-eslint/no-unnecessary-qualifier": "error",
+        "@typescript-eslint/no-unused-expressions": "error",
+        "@typescript-eslint/prefer-namespace-keyword": "error",
+        "@typescript-eslint/quotes": [
+            "error",
+            "double"
+        ],
+        "@typescript-eslint/restrict-plus-operands": "error",
+        "@typescript-eslint/semi": [
+            "error",
+            "always"
+        ],
+        "@typescript-eslint/type-annotation-spacing": "error",
+        "comma-dangle": [
+            "error",
+            "always-multiline"
+        ],
+        "curly": "error",
+        "default-case": "error",
+        "eol-last": "error",
+        "eqeqeq": [
+            "error",
+            "always"
+        ],
+        "id-denylist": [
+            "error",
+            "any",
+            "Number",
+            "number",
+            "String",
+            "string",
+            "Boolean",
+            "boolean",
+            "Undefined",
+            "undefined"
+        ],
+        "id-match": "error",
+        "import/no-default-export": "error",
+        "indent": "off",
+        "jsdoc/check-alignment": "error",
+        "jsdoc/check-indentation": "error",
+        "jsdoc/newline-after-description": "error",
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "max-len": [
+            "error",
+            {
+                "code": 120
+            }
+        ],
+        "new-parens": "error",
+        "no-console": [
+            "error",
+            {
+                "allow": [
+                    "warn",
+                    "dir",
+                    "time",
+                    "timeEnd",
+                    "timeLog",
+                    "trace",
+                    "assert",
+                    "clear",
+                    "count",
+                    "countReset",
+                    "group",
+                    "groupEnd",
+                    "table",
+                    "debug",
+                    "info",
+                    "dirxml",
+                    "error",
+                    "groupCollapsed",
+                    "Console",
+                    "profile",
+                    "profileEnd",
+                    "timeStamp",
+                    "context"
+                ]
+            }
+        ],
+        "no-empty": "error",
+        "no-empty-function": "off",
+        "no-eval": "error",
+        "no-multiple-empty-lines": "error",
+        "no-redeclare": "error",
+        "no-shadow": "off",
+        "no-trailing-spaces": "error",
+        "no-underscore-dangle": "error",
+        "no-unsafe-finally": "error",
+        "no-unused-expressions": "off",
+        "no-unused-labels": "error",
+        "no-var": "error",
+        "object-shorthand": "error",
+        "quote-props": [
+            "error",
+            "consistent-as-needed"
+        ],
+        "quotes": "off",
+        "semi": "off",
+        "spaced-comment": [
+            "error",
+            "always",
+            {
+                "markers": [
+                    "/"
+                ]
+            }
+        ],
+        "use-isnan": "error",
+        "valid-typeof": "error",
+        "@typescript-eslint/tslint/config": [
+            "error",
+            {
+                "rules": {
+                    "whitespace": [
+                        true,
+                        "check-branch",
+                        "check-decl",
+                        "check-operator",
+                        "check-module",
+                        "check-seperator",
+                        "check-type"
+                    ]
+                }
+            }
+        ]
+    }
+};

.prettierrc.js

@@ -0,0 +1,7 @@
+module.exports = {
+  semi: true,
+  printWidth: 120,
+  singleQuote: true,
+  arrowParens: 'always',
+  trailingComma: 'none'
+};

.travis.yml

@@ -1,3 +1,4 @@
+dist: focal
 language: node_js
 compiler: gcc
 env:
@@ -20,6 +21,12 @@ jobs:
     - stage: build
       node_js: "16"
       os: linux
+    - stage: build
+      node_js: "18"
+      os: linux
+    - stage: build
+      node_js: "20"
+      os: linux
     - stage: build
       node_js: "10"
       os: osx
@@ -35,6 +42,15 @@ jobs:
     - stage: build
       node_js: "16"
       os: osx
+      osx_image: xcode13.1
+    - stage: build
+      node_js: "18"
+      os: osx
+      osx_image: xcode13.1
+    - stage: build
+      node_js: "20"
+      os: osx
+      osx_image: xcode13.1
 addons:
   apt:
     sources:
@@ -47,10 +63,13 @@ addons:
 before_install:
   - npm install -g yarn
   - if [ $TRAVIS_OS_NAME == "linux" ]; then
-      export CC="gcc-7";
-      export CXX="g++-7";
-      export LINK="gcc-7";
-      export LINKXX="g++-7";
+    export CC="gcc-7";
+    export CXX="g++-7";
+    export LINK="gcc-7";
+    export LINKXX="g++-7";
+    sed -i '911s!^!//!' deps/libpng/pngpriv.h;
+    else
+    sed -i '' '911s/^/\/\/ /' deps/libpng/pngpriv.h;
     fi
   - node --version
   - yarn --version