Minor update to config files.

Author: th-awake

.github/contributing.md renamed to .github/CONTRIBUTING.md

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: PureScript Discourse
+    url: https://discourse.purescript.org/
+    about: Ask and answer questions here.
+  - name: Functional Programming Slack
+    url: https://functionalprogramming.slack.com
+    about: For casual chat and questions (use https://fpchat-invite.herokuapp.com to join).

.github/ISSUE_TEMPLATE/config.yml

@@ -5,3 +5,4 @@
 
 output
 generated-docs
+bower_components

.github/pull_request_template.md renamed to .github/PULL_REQUEST_TEMPLATE.md

@@ -1,8 +1,4 @@
 let upstream =
-      https://github.com/purescript/package-sets/releases/download/psc-0.13.8-20200615/packages.dhall sha256:5d0cfad9408c84db0a3fdcea2d708f9ed8f64297e164dc57a7cf6328706df93a
+      https://github.com/purescript/package-sets/releases/download/psc-0.13.8-20200831/packages.dhall sha256:cdb3529cac2cd8dd780f07c80fd907d5faceae7decfcaa11a12037df68812c83
 
-let overrides = {=}
-
-let additions = {=}
-
-in  upstream // overrides // additions
+in  upstream