Upgrade all manifests to v1 manifest format

manifests/m/Mozilla/Thunderbird/78.2.1/Mozilla.Thunderbird.yaml

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+PackageIdentifier: Mozilla.Thunderbird
+Publisher: Mozilla
+PackageName: Thunderbird
+Author: Mozilla
+ShortDescription: Thunderbird is a free email application that’s easy to set up and customize!
+Moniker: thunderbird
+Tags:
+- email
+- E-mail
+FileExtensions:
+- csv
+- eml
+- ldif
+- xpi
+PackageUrl: https://www.mozilla.org/en-US/firefox/new
+License: Mozilla Public License Version 2.0
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+MinimumOSVersion: 10.0.0.0
+PackageVersion: 78.2.1
+InstallerType: msi
+Installers:
+- Architecture: x64
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/78.2.1/win64/en-US/Thunderbird%20Setup%2078.2.1.msi
+  InstallerSha256: 9237f85c6723227df21baf129a0a5ae0ad948871996177e69ae068eeb4072562
+  Scope: machine
+  InstallerLocale: en-US
+PackageLocale: en-US
+ManifestType: singleton
+ManifestVersion: 1.0.0