Update deny.toml to be compatible with version 2

Since we decided to update the current deny.toml instead of using the
current template I looked up where the template came from to check
what changed from the time the deny.toml got introduced.

The deny.toml got created by commit:
1aae75b
on:
Fri Dec 4 14:27:08 2020 +0100

When looking for the last change in the deny.toml template in the repo
(https://github.com/EmbarkStudios/cargo-deny)
({repo_url}/commits/main/deny.template.toml)

The last commit should be:
98946c8732f09f4e1cce3eae766d248d3afa7ef4
on:
Nov 9, 2020

> This is a follow up to #606 that actually provides a way to remove the
deprecated fields and opt in to the new behavior until the fields are
removed and the new behavior becomes the only behavior

EmbarkStudios/cargo-deny#611

New default behavior for removed fields:
- unlicensed = "deny"
New default: deny
- copyleft = "deny"
New default: deny
- allow-osi-fsf-free = "either"
New default: neither
> it doesn't matter if the license is osi and/or fsf free, only if it is
in the allow (or exception) list.

deny.toml

@@ -1,27 +1,16 @@
 [licenses]
-# The lint level for crates which do not have a detectable license
-unlicensed = "deny"
-
 # List of explictly allowed licenses
 # See https://spdx.org/licenses/ for list of possible licenses
 # [possible values: any SPDX 3.7 short identifier (+ optional exception)].
-allow = ["MPL-2.0"]
-
-# List of explictly disallowed licenses
-# See https://spdx.org/licenses/ for list of possible licenses
-# [possible values: any SPDX 3.7 short identifier (+ optional exception)].
-deny = []
-
-# The lint level for licenses considered copyleft
-copyleft = "deny"
-
-# Blanket approval or denial for OSI-approved or FSF Free/Libre licenses
-# * both - The license will only be approved if it is both OSI-approved *AND* FSF/Free
-# * either - The license will be approved if it is either OSI-approved *OR* FSF/Free
-# * osi-only - The license will be approved if is OSI-approved *AND NOT* FSF/Free
-# * fsf-only - The license will be approved if is FSF/Free *AND NOT* OSI-approved
-# * neither - The license will be denied if is FSF/Free *OR* OSI-approved
-allow-osi-fsf-free = "either"
+allow = [
+    "Apache-2.0",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "EPL-2.0",
+    "MIT",
+    "MPL-2.0",
+    "Unicode-DFS-2016"
+]
 
 # The confidence threshold for detecting a license from license text.
 # The higher the value, the more closely the license text must be to the
@@ -48,16 +37,17 @@ allow = [
 deny = [
     # Each entry the name of a crate and a version range. If version is
     # not specified, all versions will be matched.
-    { name = "fuchsia-cprng" }
+    { crate = "fuchsia-cprng" }
 ]
 
 # Certain crates/versions that will be skipped when doing duplicate detection.
 skip = [
 ]
 
-# Similarly to `skip` allows you to skip certain crates during duplicate detection,
-# unlike skip, it also includes the entire tree of transitive dependencies starting at
-# the specified crate, up to a certain depth, which is by default infinite
+# Similarly to `skip` allows you to skip certain crates during duplicate
+# detection. Unlike skip, it also includes the entire tree of transitive
+# dependencies starting at the specified crate, up to a certain depth, which is
+# by default infinite.
 skip-tree = [
 ]