Log Message:
(math/R-igraph) Updated 1.4.1 to 1.4.3

# igraph 1.4.3

## Internal

  - Fix tests for dev waldo (#779, @hadley).

  - Fix linking on Windows: gfortran needs quadmath. (#778).

## Documentation

  - Mention limitation of Pajek reader (#776).

# igraph 1.4.2

## Breaking changes

- Remove `igraph.eigen.default()` and `eigen_defaults`, introduce
  internal `eigen_defaults()` as a function (#741).

- Remove broken `nexus*()` functions (#705), and `srand()` (#701).

## C core

- Update C core.

- ARPACK-based calculations are now interruptible.

- `shortest_paths()` and `all_shortest_paths()` no longer crash when
  an invalid `from` vertex is passed and weights are being used.

See
[diff](https://github.com/igraph/igraph/compare/87c70998344a39b44218f7af903bf62b8bbf3e71...98304787bc811bf709be5aeddea7b570c370988e)
for details.

## Printing

- Use true vertex names for printing vertex sets. If a vertex set
  captures a relationship between vertices (e.g., the `father`
  component of `bfs()`), the vertex set is printed as a named vector
  (#754).

- Suggest restarting R session after fatal error (#745).

## Bug fixes

- `as_long_data_frame()` now correctly processes vertex attributes and
  works with graphs without vertex attributes (#748).

- `as.hclust(hrg.fit(g))` works again (#721).

## Documentation

- The documentation is now available at <https://igraph.org/> (#743).

- Reorganize function reference (#662).

- Replace `graph()` with `make_graph()` in examples (#738).

- Add docs for `as.hclust.igraphHRG()` (#733).

- Merged man page of `hub_score()` and `authority_score()` (#698).

- Refactor contributors listing (#647).

- Improve "family" titles (#679).

- Improve docs of ego/neighborhood functions.

- Improve `transitivity()` docs.

## Internal

- Introduce cpp11 package to improve error handling in the long run (#720).

- Avoid longjmp for error handling and interrupts (#751).

- `as.hclust.igraphHRG` uses `.Call()` interface (#727).