Install referenced schemas in "npm:validate" task

The "npm:validate" task validates the repository's `package.json` npm manifest file against its JSON schema to catch any
problems with its data format.

In order to avoid duplication of content, JSON schemas may reference other schemas via the `$ref` keyword. The
`package.json` schema was recently updated to share resources with some other schema, which caused the validation to
start failing.

The solution is to configure the workflow to download those schemas as well and also to provide their path to the
avj-cli validator via a `-r` flag.

Author: per1234

Taskfile.yml

@@ -316,6 +316,10 @@ tasks:
       AVA_SCHEMA_URL: https://json.schemastore.org/ava.json
       AVA_SCHEMA_PATH:
         sh: task utility:mktemp-file TEMPLATE="ava-schema-XXXXXXXXXX.json"
+      # Source: https://github.com/SchemaStore/schemastore/blob/master/src/schemas/json/base.json
+      BASE_SCHEMA_URL: https://json.schemastore.org/base.json
+      BASE_SCHEMA_PATH:
+        sh: task utility:mktemp-file TEMPLATE="base-schema-XXXXXXXXXX.json"
       # Source: https://github.com/SchemaStore/schemastore/blob/master/src/schemas/json/eslintrc.json
       ESLINTRC_SCHEMA_URL: https://json.schemastore.org/eslintrc.json
       ESLINTRC_SCHEMA_PATH:
@@ -328,6 +332,10 @@ tasks:
       NPM_BADGES_SCHEMA_URL: https://json.schemastore.org/npm-badges.json
       NPM_BADGES_SCHEMA_PATH:
         sh: task utility:mktemp-file TEMPLATE="npm-badges-schema-XXXXXXXXXX.json"
+      # Source: https://github.com/SchemaStore/schemastore/blob/master/src/schemas/json/partial-eslint-plugins.json
+      PARTIAL_ESLINT_PLUGINS_SCHEMA_URL: https://json.schemastore.org/partial-eslint-plugins.json
+      PARTIAL_ESLINT_PLUGINS_PATH:
+        sh: task utility:mktemp-file TEMPLATE="partial-eslint-plugins-schema-XXXXXXXXXX.json"
       # Source: https://github.com/SchemaStore/schemastore/blob/master/src/schemas/json/prettierrc.json
       PRETTIERRC_SCHEMA_URL: https://json.schemastore.org/prettierrc.json
       PRETTIERRC_SCHEMA_PATH:
@@ -349,9 +357,11 @@ tasks:
     cmds:
       - wget --quiet --output-document="{{.SCHEMA_PATH}}" {{.SCHEMA_URL}}
       - wget --quiet --output-document="{{.AVA_SCHEMA_PATH}}" {{.AVA_SCHEMA_URL}}
+      - wget --quiet --output-document="{{.BASE_SCHEMA_PATH}}" {{.BASE_SCHEMA_URL}}
       - wget --quiet --output-document="{{.ESLINTRC_SCHEMA_PATH}}" {{.ESLINTRC_SCHEMA_URL}}
       - wget --quiet --output-document="{{.JSCPD_SCHEMA_PATH}}" {{.JSCPD_SCHEMA_URL}}
       - wget --quiet --output-document="{{.NPM_BADGES_SCHEMA_PATH}}" {{.NPM_BADGES_SCHEMA_URL}}
+      - wget --quiet --output-document="{{.PARTIAL_ESLINT_PLUGINS_PATH}}" {{.PARTIAL_ESLINT_PLUGINS_SCHEMA_URL}}
       - wget --quiet --output-document="{{.PRETTIERRC_SCHEMA_PATH}}" {{.PRETTIERRC_SCHEMA_URL}}
       - wget --quiet --output-document="{{.SEMANTIC_RELEASE_SCHEMA_PATH}}" {{.SEMANTIC_RELEASE_SCHEMA_URL}}
       - wget --quiet --output-document="{{.STYLELINTRC_SCHEMA_PATH}}" {{.STYLELINTRC_SCHEMA_URL}}
@@ -361,9 +371,11 @@ tasks:
           --all-errors \
           -s "{{.SCHEMA_PATH}}" \
           -r "{{.AVA_SCHEMA_PATH}}" \
+          -r "{{.BASE_SCHEMA_PATH}}" \
           -r "{{.ESLINTRC_SCHEMA_PATH}}" \
           -r "{{.JSCPD_SCHEMA_PATH}}" \
           -r "{{.NPM_BADGES_SCHEMA_PATH}}" \
+          -r "{{.PARTIAL_ESLINT_PLUGINS_PATH}}" \
           -r "{{.PRETTIERRC_SCHEMA_PATH}}" \
           -r "{{.SEMANTIC_RELEASE_SCHEMA_PATH}}" \
           -r "{{.STYLELINTRC_SCHEMA_PATH}}" \