Upgrade Simplemma to version 0.7

[osma]

This PR upgrades the Simplemma dependency (which is used in the simplemma analyzer, added in #591) from version 0.6 to 0.7.

Simplemma now does the loading of language data internally, so the calling code could be simplified even more from what it was. There is no need for the __getstate__ trick so that was deleted too.

Related to this comment

Note that I haven't tested this for real (yet), just verified that the tests pass, so keeping it as a draft PR for now.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #594 (add4b19) into master (8702efb) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #594      +/-   ##
==========================================
- Coverage   99.48%   99.48%   -0.01%     
==========================================
  Files          86       86              
  Lines        5645     5636       -9     
==========================================
- Hits         5616     5607       -9     
  Misses         29       29              

Impacted Files	Coverage Δ
tests/test_analyzer_simplemma.py	100.00% <ø> (ø)
annif/analyzer/simplemma.py	100.00% <100.00%> (ø)

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[osma]

Test results added to the table taken from #591:

backend	train set	lang	analyzer	train jobs	train time	train RSS	eval set	eval jobs	eval time	eval RSS	F1@5	NDCG
mllm	kirjastonhoitaja/fulltext-train	fi	voikko	4	357.78	1123776	kirjastonhoitaja/test	4	192.90	340248	0.3259	0.4368
mllm	kirjastonhoitaja/fulltext-train	fi	simplemma-initial	4	362.77	3456424	kirjastonhoitaja/test	4	221.09	2691512	0.3269	0.4303
mllm	kirjastonhoitaja/fulltext-train	fi	simplemma+lru_cache	4	357.15	3465288	kirjastonhoitaja/test	4	220.12	2691228	0.3217	0.4351
mllm	kirjastonhoitaja/fulltext-train	fi	simplemma+lru_cache+load_data	4	330.41	1900016	kirjastonhoitaja/test	4	213.71	1291668	0.3246	0.4363
mllm	kirjastonhoitaja/fulltext-train	fi	simplemma 0.7	4	328.74	1904932	kirjastonhoitaja/test	4	215.02	1290344	0.3231	0.4380
omikuji-parabel	yso-finna (100k)	fi	voikko	4	243.78	748772	kirjastonhoitaja/test	4	21.84	557580	0.2033	0.2903
omikuji-parabel	yso-finna (100k)	fi	simplemma-initial	4	305.54	2748572	kirjastonhoitaja/test	4	49.17	2738524	0.2043	0.2890
omikuji-parabel	yso-finna (100k)	fi	simplemma+lru_cache	4	290.90	2775552	kirjastonhoitaja/test	4	41.80	2738080	0.2123	0.2826
omikuji-parabel	yso-finna (100k)	fi	simplemma+lru_cache+load_data	4	233.96	1648580	kirjastonhoitaja/test	4	42.36	1531068	0.2071	0.2970
omikuji-parabel	yso-finna (100k)	fi	simplemma 0.7	4	228.22	1696524	kirjastonhoitaja/test	4	40.85	1530076	0.2103	0.2877

The results are essentially unchanged (runs completed slightly faster) and no problems were encountered. I will merge this.