schema_salad 4.5.20191023134839 Fix typo breaking internal links

Fix typo breaking internal links #285 by @tetron (and a mea culpa from @mr-c !)

schema_salad 4.5.20191017101802

Fix doc generation refactor t -> entry #282 by @tetron
Refactor SourceLine#makeLead #283 by @tom-tan
root the exception hierarchy in SchemaSaladException #280 by @mr-c with help from @manabuishii
base_url parameter to urljoin shouldn't be optional. #279 by @tetron
tests: do not lower case the path #277 by @mr-c
omit metaschema.py from the coverage check #275 by @mr-c

schema_salad 4.5.20190815125611

Pass through anonymous node identifiers. (aka blank nodes) (#272)
Pin pytest version to be < 5.0 (#271)
allow LineCol data to be absent (#274) (#270)

schema_salad 4.5.20190729164411

Turn on strict type checking, upgrade to mypy 0.710 (#261) & Upgrade to mypy 0.720 (#267)

finish upgrade to pytest (#268)

codegen: add plain initializers (#263)

switch to the Black code formatter (#269)

2.6.20171201034858

Make link checking $schemas section and extension fields non-fatal. (…

2.6.20171116190026: Make exceptions loading extension schemas non-fatal. (#144)

* Make exceptions loading extension schemas non-fatal.

Also cache results of check_exists().

2.6.20170927145003: Refactor Windows relative path support (#131)

* Refactor Windows relative path support

2.5.20170428142041

Validation fix.  Must raise exception when raise_ex is true and recor…

2.5.20170328195758: Fix for self-colliding ids on $import (#102)

* Fix for self-colliding ids on $import

2.5.20170327140858: Validating Ids for duplicate Issue#56 (#98)

* Validating duplicate ids are not present Issue#56