Maintenance: update devDependencies and peerDependencies, fix npm audits and make tests run

[jacklrs]

There is raviger which make this pull request obsolete ...

Hi, I had issues install this package in context of npm7 and packages depending on react 7.x . Since I like to go further with this package (thx to this nice approach!) and I like to help try to update it instead of apply possible workarounds with npm install flags (e.g via --legacy-peer-deps flat), here the changes:

• Updated peerDependencies to be compatible with npm7 and packages depending on react 17.x
• Corrected package version to mach current latest version (1.2.5)
• Fixed all npm audit findings by updating all devDependencies
• Fixed all tests to run successfully
• added eslint as devDependency

Thx in advance for any feedback and potential merge!

[pramodkandel]

I really like hookrouter, and I had this problem recently with npm7 as well. Hopefully this patch gets merged.