commonmark.js 0.29.3

• Fix some rough edges around ES modules (Kyle E. Mitchell)
  (#195, #201, #203):
  • Set module types via package.json files in subdirectories.
    A number of JavaScript files were rewritten as ES
    Modules, but their extensions remained .js. That
    extension is ambiguous to newer version of the Node.js
    runtime, which can load both CommonJS modules and ES
    Modules. To fix this, we add package.json files with
    type properties to the various subdirectories. Setting
    type to "module" tells Node.js to interpret .js
    files in that directory and below as ES Modules.
    Otherwise, Node.js falls back on the package.json at
    root, which currently sets type to "commonjs".
  • Make benchmark and test use commonjs again.
  • bin: remove use of ESM and use require('../').
    Node.js version 14, which supports ES Modules without any flag or the
    esm package, is currently in long-term support. But a great many
    folks still run older version of Node.js that either don't support ES
    Modules at all or hide that support behind a feature flag.
  • Import specific functions from entities package.
  • Update "Basic Usage" comment in lib/index.js.
• Remove package-lock.json (Kyle E. Mitchell).
• Fix 'make test' target so that dist is built.
• reHtmlTag: don't use case-insensitive matching (#193).
  The spec specifies uppercase for declarations and CDATA.
• Handle piped input from stdin in windows. Use file descriptor 0
  instead of '/dev/stdin'. Note that this allows piping but doesn't
  handle the case where users run bin/commonmark and enter input
  directly. See #198 for some relevant discussion.
• Configure GitHub Actions to test on Node.js 14 and 15 (Kyle E. Mitchell).
• Allow EOL in processing instructions (#196).