Set babel dependencies to fixed version and added core-js2 support

[abotteram]

Description

Set babel beta dependencies to a fixed version.

Adds core-js2 support for @babel/plugin-transform-runtime in babel-preset-default package.

Fixes #8580

How has this been tested?

Screenshots

Types of changes

Fix

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.

[gziolo]

It turns out that to make it work with Babel beta 7.56 and core-js-2 flag you need to use also @babel/runtime-corejs2 instead of @babel/runtime.

I also regenerated package-json.lock with all the Babel packages updated to the correct version.

[gziolo]

Before change:

                                       Asset       Size  Chunks                    Chunk Names
                       ./build/blob/index.js  909 bytes      22  [emitted]         blob
                  ./build/wordcount/index.js     10 KiB       0  [emitted]         wordcount
                        ./build/url/index.js   20.5 KiB       2  [emitted]         url
                  ./build/shortcode/index.js   16.2 KiB       3  [emitted]         shortcode
                    ./build/plugins/index.js   24.5 KiB       4  [emitted]         plugins
                        ./build/nux/index.js   23.6 KiB       5  [emitted]         nux
                   ./build/keycodes/index.js   17.9 KiB       6  [emitted]         keycodes
           ./build/is-shallow-equal/index.js   1.15 KiB       7  [emitted]         isShallowEqual
                       ./build/i18n/index.js   27.4 KiB       8  [emitted]         i18n
              ./build/html-entities/index.js  986 bytes       9  [emitted]         htmlEntities
                      ./build/hooks/index.js   19.3 KiB      10  [emitted]         hooks
                    ./build/element/index.js   42.4 KiB      11  [emitted]         element
                     ./build/editor/index.js    348 KiB      12  [emitted]  [big]  editor
                  ./build/dom-ready/index.js  778 bytes      13  [emitted]         domReady
                        ./build/dom/index.js   22.6 KiB      14  [emitted]         dom
                 ./build/deprecated/index.js   10.8 KiB      15  [emitted]         deprecated
                       ./build/date/index.js    192 KiB      16  [emitted]         date
                       ./build/data/index.js   66.6 KiB      17  [emitted]         data
                  ./build/core-data/index.js   73.2 KiB      18  [emitted]         coreData
                    ./build/compose/index.js   32.4 KiB      19  [emitted]         compose
                     ./build/blocks/index.js    228 KiB      21  [emitted]         blocks
                   ./build/viewport/index.js   24.2 KiB       1  [emitted]         viewport
                      ./build/autop/index.js   29.3 KiB      23  [emitted]         autop
                  ./build/api-fetch/index.js   33.4 KiB      24  [emitted]         apiFetch
                       ./build/a11y/index.js   5.32 KiB      25  [emitted]         a11y
                ./build/core-blocks/index.js    188 KiB      26  [emitted]         coreBlocks
                  ./build/edit-post/index.js   78.1 KiB      27  [emitted]         editPost
                      ./build/utils/index.js   40.6 KiB      28  [emitted]         utils
                 ./build/components/index.js    499 KiB      29  [emitted]  [big]  components

./build/block-serialization-spec-parser/index.js 9.48 KiB 20 [emitted] blockSerializationSpecParser

After change:

                                       Asset       Size  Chunks                    Chunk Names
                       ./build/blob/index.js  909 bytes      22  [emitted]         blob
                  ./build/wordcount/index.js     10 KiB       0  [emitted]         wordcount
                        ./build/url/index.js   20.5 KiB       2  [emitted]         url
                  ./build/shortcode/index.js   16.2 KiB       3  [emitted]         shortcode
                    ./build/plugins/index.js   24.5 KiB       4  [emitted]         plugins
                        ./build/nux/index.js   23.6 KiB       5  [emitted]         nux
                   ./build/keycodes/index.js   17.9 KiB       6  [emitted]         keycodes
           ./build/is-shallow-equal/index.js   1.15 KiB       7  [emitted]         isShallowEqual
                       ./build/i18n/index.js   27.4 KiB       8  [emitted]         i18n
              ./build/html-entities/index.js  986 bytes       9  [emitted]         htmlEntities
                      ./build/hooks/index.js   19.3 KiB      10  [emitted]         hooks
                    ./build/element/index.js   42.4 KiB      11  [emitted]         element
                     ./build/editor/index.js    348 KiB      12  [emitted]  [big]  editor
                  ./build/dom-ready/index.js  778 bytes      13  [emitted]         domReady
                        ./build/dom/index.js   23.1 KiB      14  [emitted]         dom
                 ./build/deprecated/index.js   10.8 KiB      15  [emitted]         deprecated
                       ./build/date/index.js    192 KiB      16  [emitted]         date
                       ./build/data/index.js   66.6 KiB      17  [emitted]         data
                  ./build/core-data/index.js   72.7 KiB      18  [emitted]         coreData
                    ./build/compose/index.js   32.4 KiB      19  [emitted]         compose
                     ./build/blocks/index.js    228 KiB      21  [emitted]         blocks
                   ./build/viewport/index.js   24.2 KiB       1  [emitted]         viewport
                      ./build/autop/index.js   29.3 KiB      23  [emitted]         autop
                  ./build/api-fetch/index.js   33.4 KiB      24  [emitted]         apiFetch
                       ./build/a11y/index.js   5.32 KiB      25  [emitted]         a11y
                ./build/core-blocks/index.js    188 KiB      26  [emitted]         coreBlocks
                  ./build/edit-post/index.js   78.1 KiB      27  [emitted]         editPost
                      ./build/utils/index.js   40.6 KiB      28  [emitted]         utils
                 ./build/components/index.js    499 KiB      29  [emitted]  [big]  components

./build/block-serialization-spec-parser/index.js 9.48 KiB 20 [emitted] blockSerializationSpecParser

I noticed only difference in ./build/dom/index.js - which is super tiny. It should be good to go. I would appreciate another look from someone else.

[gziolo]

@gwwar - did you have similar issues when integrating with Calypso with the version of Babel?