Alpha release of v10

Mainly to test new build pipeline at this stage, though hopefully the published resources will actually work)

Babel upgrades

In theory, this should not cause anybody any problems

Fixes various types

fixed type errors in a way which is looser, but definitely backwasrd …

…compatible

Allow overwriting regex routes

Fix: support overwriting routes with regex matcher

Prior to this change, using a regex matcher combined with
`overwriteRoutes: true` would not overwrite the route. This is because
the inspection was comparing regexes with `===` which will always return
`false`. To fix this, object identifiers are coerced to strings before
comparing. Function matchers are not affected by this change.

Add lastResponse to type defs

v9.10.8

Add tests for lastResponse type

Refactor routes to be wrapped in a class

v9.10.7

matchers list is a static property

Fix mocking requests with bodies in safari

Merge pull request #585 from lambdalisue/hotfix-584

Patch native fetch on Safari to fix #584

Make typescript types available when importing the esm build

Merge pull request #583 from RoXuS/enableTypescriptEsm

Enable typescript on esm build

Prevent responses from hanging in node-fetch

Merge pull request #580 from wheresrhys/nasty-clone-bug

fix the node-fetch cloned response hanging bug as best I can

Add `matchPartialBody` to typings

Merge pull request #574 from stefanschenk/patch-1

Add `matchPartialBody` to typings