Downgrade to history v4

[leplatrem]

See supasate/connected-react-router#312

[grahamalama]

Can you think of a way we could write a test for this that fails with history@^5 but passes with history@^4 to prevent future regressions?

[leplatrem]

Can you think of a way we could write a test for this that fails with history@^5 but passes with history@^4 to prevent future regressions?

Something around following links / navigation. I don't know yet whether this would require a full browser or not.

[grahamalama]

Alternatively, maybe we can upgrade our build process to use npm v7 because of how peer dependencies are treated:

In previous versions of npm (4-6), peer dependencies conflicts presented a warning that versions were not compatible, but would still install dependencies without an error. npm 7 will block installations if an upstream dependency conflict is present that cannot be automatically resolved.

[leplatrem]

Good catch! Yes! I was indeed wondering why peer deps were not blocking anything here