Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
Build system and dependencies:
* Update many dependencies to new versions.
+ * Tested build with Rust nightly-2021-07-15.
* Dependencies on tera templating engine slightly rationalised.
* Maekfile: avoid rebuilding the otter cli over and over again,
by touching it when we rebuild it.
version of Otter you have. The following is known to work with
Otter 0.7.1::
- rustup default nightly-2021-06-08 # downloads e4a603270 2021-06-07
+ rustup default nightly-2021-07-15 # downloads 2f391da2e 2021-07-14
**If you just want to run the otter cli client over ssh to an existing server, or edit and preview the shape libraries (ie the piece shapes) you can stop here.**