Docs: remove Heroku install section

docs/install.md

@@ -228,16 +228,6 @@ the use of an alternative memory allocator such as
 Those using musl-based Linux (e.g. Alpine) and non-Linux systems are
 unaffected.
 
-## Heroku
-
-Add the
-[jemalloc buildpack](https://github.com/gaffneyc/heroku-buildpack-jemalloc)
-to reduce the effects of memory fragmentation.
-
-Set
-[NODE_MODULES_CACHE](https://devcenter.heroku.com/articles/nodejs-support#cache-behavior)
-to `false` when using the `yarn` package manager.
-
 ## AWS Lambda
 
 The `node_modules` directory of the

docs/search-index/stop-words.js

@@ -60,14 +60,18 @@ module.exports = [
   'must',
   'non',
   'not',
+  'now',
   'occur',
   'occurs',
   'options',
   'other',
   'out',
   'over',
+  'part',
   'perform',
   'performs',
+  'please',
+  'previously',
   'produce',
   'provide',
   'provided',
@@ -112,6 +116,7 @@ module.exports = [
   'using',
   'value',
   'values',
+  'via',
   'were',
   'when',
   'which',