* master: (140 commits)
  Update to beta.42 (babel#7609)
  Disable flow on transformClass, fix preset-env errors (babel#7605)
  Logical Assignment: ensure computed key isn't recomputed (babel#7604)
  Remove obsolete max-len eslint rule and reformat some stuff to fit (babel#7602)
  Centralize Babel's own compilation config to make it easier to follow. (babel#7599)
  Run prettier to format all JSON.
  Tweak es2015-related plugin order in preset-env (babel#7586)
  Refactored quirky inheritance in babel-plugin-transform-classes (babel#7444)
  Add RegExp support to include/exclude preset-env options (babel#7242)
  v7.0.0-beta.42
  Use strict namespace behavior for mjs files. (babel#7545)
  Remove outdated spec deviation note [skip ci] (babel#7571)
  Ensure that the backward-compat logic for plugin-utils copies over the version API properly. (babel#7580)
  Rename actual/expected test files to input/output (babel#7578)
  Use helper-module-import inside entry plugin too
  Use helper-module-imports instead of custom import (babel#7457)
  Fix "Module build failed: Error: Cannot find module '@babel/types'" (babel#7575)
  Wrap wrapNativeSuper helpers in redefining functions for better tree-shakeability (babel#7188)
  Favour extends helper over objectWithoutProperties when whole object gets copied anyway (babel#7390)
  Fix incorrect value of _cache in _wrapNativeSuper (babel#7570)
  ...