For configs, switch back to exact versions

I realized that without exact versions, we don't have to release a new version of standard when we relax a rule in one of the configs, like I just did for #1382

I would rather be forced to release a new version when I do this, so we have to add a changelog entry and document the change.

package.json

@@ -13,8 +13,8 @@
   },
   "dependencies": {
     "eslint": "~6.1.0",
-    "eslint-config-standard": "~14.0.0",
-    "eslint-config-standard-jsx": "~8.0.0",
+    "eslint-config-standard": "14.0.0",
+    "eslint-config-standard-jsx": "8.0.1",
     "eslint-plugin-import": "~2.18.0",
     "eslint-plugin-node": "~9.1.0",
     "eslint-plugin-promise": "~4.2.1",