Fix some issues reported by lintian

Fix some issues reported by lintian

• Update watch file format version to 4. (older-debian-watch-file-standard)

• Set upstream metadata fields: Repository-Browse. (upstream-metadata-file-is-missing)

• Update pattern for GitHub archive URLs from ///tags page///archive/ -> ///archive/refs/tags/.

• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)

This merge proposal was created automatically by the Janitor bot. For more information, including instructions on how to disable these merge proposals, see https://janitor.debian.net/lintian-fixes.

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/fieldslib/1d8f7d7e-fe15-4842-b9d5-e82ae33ee175.

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second set of .debs but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/53/66ef2c6a2cc113046e5e740b764d35ce434082.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/bf/0ff0ead5c06b42d95b416d216d8eea5da22f64.debug

Control files of package libfieldslib-ocaml: lines which differ (wdiff format)

• Depends: libbase-ocaml-woie8, libsexplib0-ocaml-l23l7, libbase-ocaml-34zr6, libsexplib0-ocaml-dj6s4, ocaml-base-4.13.1
• Provides: libfieldslib-ocaml-b9240 libfieldslib-ocaml-gq2p1

Control files of package libfieldslib-ocaml-dbgsym: lines which differ (wdiff format)

• Build-Ids: bf0ff0ead5c06b42d95b416d216d8eea5da22f64 5366ef2c6a2cc113046e5e740b764d35ce434082

Control files of package libfieldslib-ocaml-dev: lines which differ (wdiff format)

• Depends: libbase-ocaml-dev-woie8, libfieldslib-ocaml-b9240, libsexplib0-ocaml-dev-l23l7, libbase-ocaml-dev-34zr6, libfieldslib-ocaml-gq2p1, libsexplib0-ocaml-dev-dj6s4, ocaml-4.13.1
• Provides: libfieldslib-ocaml-dev-b9240 libfieldslib-ocaml-dev-gq2p1

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