Min max delegation amounts

[moubctez]

Implements https://github.com/casper-network/ceps/pull/90

[wojcik91]

@mpapierski ping

[wojcik91]

@mpapierski We added the forced undelegation process as discussed last week in https://github.com/casper-network/casper-node/pull/4569/commits/f1a1400f61c9f0618fdcdbc70c9122c3b25ea103

[casperlabs-bors-ng[bot]]

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[moubctez]

@EdHastingsCasperAssociation I cannot merge. Please, do the trick.

[casperlabs-bors-ng[bot]]

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[mpapierski]

bors r+

[casperlabs-bors-ng[bot]]

Timed out.

[mpapierski]

bors r+

[casperlabs-bors-ng[bot]]

Timed out.

[mpapierski]

bors r+

[casperlabs-bors-ng[bot]]

Timed out.

[mpapierski]

bors r+

[casperlabs-bors-ng[bot]]

Canceled.

[mpapierski]

bors r+

[casperlabs-bors-ng[bot]]

Build failed:

• continuous-integration/drone/push

[casperlabs-bors-ng[bot]]

:lock: Permission denied

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[mpapierski]

bors r+

[casperlabs-bors-ng[bot]]

Timed out.

[mpapierski]

bors r+

[casperlabs-bors-ng[bot]]

Timed out.