Because otherwise there might be a syntax error looking like
```
error: syntax error, unexpected QQSTRING_START, expecting IDENT
.dependencies."matrix-js-sdk"
```
Update README instructions and add checks to release script to
prevent us forgetting to bump the versions of dependencies
(because the check in the main release script will only catch
references to #develop left in, which will no longer be the
failure mode).
instead of the actual electron package. With no way to ignore directories.
I'd like to think of this as temporary, until I get to rip apart riot-web
and riot-electron
Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>