Bump terser and react-scripts in /frontend

[dependabot]

Bumps terser and react-scripts. These dependencies needed to be updated together.
Updates terser from 3.17.0 to 4.8.1

Changelog

Sourced from terser's changelog.

v4.8.1 (backport)

• Security fix for RegExps that should not be evaluated (regexp DDOS)

v4.8.0

• Support for numeric separators (million = 1_000_000) was added.
• Assigning properties to a class is now assumed to be pure.
• Fixed bug where yield wasn't considered a valid property key in generators.

v4.7.0

• A bug was fixed where an arrow function would have the wrong size
• arguments object is now considered safe to retrieve properties from (useful for length, or 0) even when pure_getters is not set.
• Fixed erroneous const declarations without value (which is invalid) in some corner cases when using collapse_vars.

v4.6.13

• Fixed issue where ES5 object properties were being turned into ES6 object properties due to more lax unicode rules.
• Fixed parsing of BigInt with lowercase e in them.

v4.6.12

• Fixed subtree comparison code, making it see that [1,[2, 3]] is different from [1, 2, [3]]
• Printing of unicode identifiers has been improved

v4.6.11

• Read unused classes' properties and method keys, to figure out if they use other variables.
• Prevent inlining into block scopes when there are name collisions
• Functions are no longer inlined into parameter defaults, because they live in their own special scope.
• When inlining identity functions, take into account the fact they may be used to drop this in function calls.
• Nullish coalescing operator (x ?? y), plus basic optimization for it.
• Template literals in binary expressions such as + have been further optimized

v4.6.10

• Do not use reduce_vars when classes are present

v4.6.9

• Check if block scopes actually exist in blocks

v4.6.8

• Take into account "executed bits" of classes like static properties or computed keys, when checking if a class evaluation might throw or have side effects.

v4.6.7

• Some new performance gains through a AST_Node.size() method which measures a node's source code length without printing it to a string first.

... (truncated)

Commits

• 40674a4 update changelog, version
• d8cc569 backport fix to potential regexp DDOS
• 504b967 4.8.0
• 9f380dc update changelog
• 7dd0b9d update assumptions
• cfad907 Allow yield to be used as property key in generators.
• 283f44f Make class property assignment pure.
• ee965e8 Add numeric separators support (#725)
• ee6b8af 4.7.0
• 807f729 update changelog
• Additional commits viewable in compare view

Updates react-scripts from 3.0.1 to 3.4.4

Changelog

Sourced from react-scripts's changelog.

3.4.4 (2020-10-20)

v3.4.4 release bumps resolve-url-loader to a version for which npm audit does not report a vulnerability. Note that this vulnerability did not affect Create React App projects, so this change is only necessary to satisfy auditing tools.

Migrating from 3.4.3 to 3.4.4

Inside any created project that has not been ejected, run:

npm install --save --save-exact react-scripts@3.4.4

or

yarn add --exact react-scripts@3.4.4

3.4.3 (2020-08-12)

v3.4.3 release bumps terser-webpack-plugin to a version for which npm audit does not report a vulnerability. Note that this vulnerability did not affect Create React App projects, so this change is only necessary to satisfy auditing tools.

Migrating from 3.4.2 to 3.4.3

Inside any created project that has not been ejected, run:

npm install --save --save-exact react-scripts@3.4.3

or

yarn add --exact react-scripts@3.4.3

3.4.2 (2020-08-11)

v3.4.2 release bumps webpack-dev-server to a version for which npm audit does not report a vulnerability. Note that this vulnerability did not affect Create React App projects, so this change is only necessary to satisfy auditing tools.

Migrating from 3.4.1 to 3.4.2

Inside any created project that has not been ejected, run:

npm install --save --save-exact react-scripts@3.4.2

or

... (truncated)

Commits

• 6c009ed react-scripts@3.4.4
• f04bd63 react-scripts@3.4.3
• fb711ec react-scripts@3.4.2
• d2f813f Publish
• d5b527f Update to Babel 7.9 (#8681)
• a452ddc Bump dependencies (#8620)
• 4d26208 Use native ESLint behaviour when extending (#8276)
• 8ba0ccb Whitelist main in template.json (#8539)
• 038e6fa Widen eslint-config-react-app peer dependency versions (#7790)
• 7e6d6cd Closes webpack dev server and exits process on "end" stdin (#7203)
• Additional commits viewable in compare view

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