feat: merge v3 (#39)

BREAKING CHANGE: the CLI can't be invoked without specifying any input files anymore. To convert all files in a directory, use a shell glob instead (e. g. `md-to-pdf *.md`). It's now possible to read markdown from stdin.

The whole source code has been converted to Typescript. The minimum required node version has been increased to v10.0.0 (current LTS). It should still work with v8.3.0+ but the tests won't be able to run.

The license has been changed to MIT.

.github/workflows/main.yml

@@ -4,18 +4,16 @@ on:
   push:
     paths:
       - '.github/workflows/*'
-      - 'lib/*'
-      - 'test'
-      - 'cli.js'
-      - 'index.js'
+      - 'src/**'
       - 'markdown.css'
       - 'package*.json'
 
 jobs:
   build:
     strategy:
+      fail-fast: false
       matrix:
-        node: [8, 10, 12]
+        node: [10, 12]
         os: ['ubuntu-latest', 'windows-latest', 'macOS-latest']
 
     name: Node ${{ matrix.node }} on ${{ matrix.os }}
@@ -29,16 +27,21 @@ jobs:
         with:
           version: ${{ matrix.node }}.x
 
-      - name: install and lint
-        run: |
-          npm install
-          npx xo
+      - name: install
+        run: npm install
+
+      - name: lint
+        run: npx xo
+        if: matrix.os != 'windows-latest' # because "Delete ␍  prettier/prettier" o.O
+
+      - name: build
+        run: npm run build
 
       - name: test lib
-        run: npx nyc ava test/lib.spec.js
+        run: npx nyc ava src/test/lib.spec.ts
 
       - name: test api
-        run: npx ava test/api.spec.js
+        run: npx ava src/test/api.spec.ts
 
       - name: test cli
-        run: npx ava test/cli.spec.js
+        run: npx ava src/test/cli.spec.ts --timeout=1m

.gitignore

@@ -2,8 +2,11 @@
 .vscode
 node_modules
 
+# generated
+dist
+
 # tests
 .nyc_output
 coverage
-test/**/*.pdf
-test/**/*.html
+src/test/**/*.pdf
+src/test/**/*.html