Move from `error-chain` to `thiserror`#394

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pwoolcoc wants to merge 13 commits intokillercup:masterfrom

pwoolcoc:issue-344-switch-to-thiserror

Commits on Apr 2, 2020

Move cargo-edit lib to thiserror
Paul Woolcock
committed
Use `thiserror` for cargo-add
Paul Woolcock
committed
use `thiserror` for cargo-rm
Paul Woolcock
committed
use `thiserror` for cargo-upgrade
Paul Woolcock
committed
Remove leading `::` from import paths
Paul Woolcock
committed
change these loops to while-lets
Paul Woolcock
committed

Commits on Apr 7, 2020

Add `anyhow` to crate lib
Paul Woolcock
committed
Add `anyhow` to cargo-add
Paul Woolcock
committed
Add `anyhow` to cargo-rm
Paul Woolcock
committed
Add `anyhow` to cargo-upgrade
Paul Woolcock
committed
rustfmt pass
Paul Woolcock
committed
Remove `anyhow` from the library
Paul Woolcock
committed

Commits on Apr 8, 2020

Reduce the number of possible errors
Paul Woolcock
committed