flairNLPGH-614: add historic German language models by @stefan-it

Author: aakbik

flair/embeddings.py

@@ -986,6 +986,10 @@ def __init__(
             # German
             "de-forward": f"{aws_path}/embeddings/lm-mix-german-forward-v0.2rc.pt",
             "de-backward": f"{aws_path}/embeddings/lm-mix-german-backward-v0.2rc.pt",
+            "de-historic-ha-forward": f"{aws_path}/embeddings-stefan-it/lm-historic-hamburger-anzeiger-forward-v0.1.pt",
+            "de-historic-ha-backward": f"{aws_path}/embeddings-stefan-it/lm-historic-hamburger-anzeiger-backward-v0.1.pt",
+            "de-historic-wz-forward": f"{aws_path}/embeddings-stefan-it/lm-historic-wiener-zeitung-forward-v0.1.pt",
+            "de-historic-wz-backward": f"{aws_path}/embeddings-stefan-it/lm-historic-wiener-zeitung-backward-v0.1.pt",
             # Spanish
             "es-forward": f"{aws_path}/embeddings-v0.4/language_model_es_forward_long/lm-es-forward.pt",
             "es-backward": f"{aws_path}/embeddings-v0.4/language_model_es_backward_long/lm-es-backward.pt",