yaml configuration files and cleanup (#47)

- update eslint to 2.13.0
- convert eslintrc to yaml
- convert language grammar and configuration to yaml
  - their json output is minified
- update vsce ignores
- simplify many regex patterns
- fix number highlighting inside variable names
- add highlighting for a few missing keywords
- slightly restructure tests
- change some scope names to comply with textmate spec

.eslintignore

@@ -1,2 +1,2 @@
 node_modules/
-out/
+*.js

.eslintrc.yml

@@ -0,0 +1,14 @@
+root: true
+parser: '@typescript-eslint/parser'
+parserOptions:
+  tsconfigRootDir: .
+  project: [./tsconfig.json]
+plugins:
+  - '@typescript-eslint'
+extends:
+  - eslint:recommended
+  - plugin:@typescript-eslint/recommended
+rules:
+  no-duplicate-imports: error
+  no-template-curly-in-string: error
+  eqeqeq: error

.vscodeignore

@@ -1,14 +1,20 @@
-# raw images
-*.xcf
+# version control
+.gitignore
+.github/
+
+# config files
+.eslintignore
+tsconfig.json
+
+# source files
+src/
+**/scripts/
+**/tests/
+**/*.yml
+**/*.xcf
 
 # other
-.github/
 .vscode/
 *.code-workspace
-src/
-**/tests/
 **/*.map
-.gitignore
-tsconfig.json
-.eslintrc.json
-.eslintignore
+CONTRIBUTING.md

language-configuration.yml

@@ -0,0 +1,13 @@
+comments:
+  lineComment: "'"
+
+brackets:
+  - [(, )]
+
+autoClosingPairs:
+  - [(, )]
+  - ['"', '"']
+
+surroundingPairs:
+  - [(, )]
+  - ['"', '"']